home Aquarium DIY aquarium co2 generator

DIY aquarium co2 generator

Balloon installation

Some large aquariums are supplied with CO2 by means of a system consisting of a main cylinder, a reducer, which does not allow the gas pressure to rise. Solenoid and non-return valves designed to control the gas and prevent the release of water into the reducer. And also the system includes a tube through which gas enters the aquarium and a special fast carbon dioxide diffuser. a diffuser. Such a system is called a balloon installation, it is convenient to use and looks aesthetically pleasing (does not spoil the appearance of the aquarium).

How to spray CO2

To spray CO2 evenly into the aquarium, use:

Optimal CO2 level table

aquarium, generator

The green area in the table is the area with the optimal CO2 supply to the aquarium.

Dropchecker tests

The easiest way to determine water hardness is with a dropchecker. When it enters it, the water is painted yellow, which indicates an excess of carbon dioxide, green is the optimal value, and its blue color warns of insufficient intake of CO2.

Other methods

Using a plastic bottle, sugar and yeast, you can easily make an economical gas supply for aquariums. To do this, pour the sugar and yeast into a transparent plastic vessel, drill a hole in the lid and insert a tube. One end of which remains in the vessel, and the other in the aquarium. After the fermentation process begins, carbon dioxide is removed through the tube and through the sprayer enters the water.

DIY gas generator

In order to make a CO2 generator with your own hands, it will take a lot of time and material. The principle of operation of the generator is to combine citric acid, which comes from one vessel to another, with baking soda. As a result of the reaction, CO2 is supplied to the aquarium.

In order to make a CO2 reactor for an aquarium with your own hands, you need to take two plastic bottles of the same volume and drill 2 holes for the hoses in the lids. One hose with a non-return valve is used to connect two containers. Two holes are for the tee pipe. One of the tube branches has the same non-return valve. In order to regulate the flow, a faucet is attached to the central branch of the tee, and hoses with valves are inserted into the second vessel.

In order for the installation to start the process of gas generation, the necessary reagents must be prepared. The first container is filled with a water-soda solution, and the second. with a citric acid solution. When you press on the container with citric acid, which enters the soda solution through the first hose, a reaction occurs with the release of carbon dioxide. A check valve prevents the soda solution from entering the acid bottle. Carbon dioxide passes into the acid bottle and the central branch of the tee, after which it enters the aquarium. Thus, you can get a CO2 supply system at home.

5 ways to supply CO2 (carbon dioxide) to your aquarium

DIY aquarium CO2 generator

If you have a small (usually up to 150 liters) plant aquarium, then you can make a CO2 generator yourself. This does not require large costs, just a few simple available materials and mash according to any recipe posted on the Internet.

A DIY CO2 generator is usually very cheap, and most mash recipes use sugar and baker’s yeast. The disadvantage of a self-made CO2 generator is that the wash must be changed at least every 2 weeks. during this time, the solution is usually completely “exhaled”. Would need

  • Any plastic container with a tight-fitting lid. Some containers, however, perform better than others. The volume is desirable 1-2 liters (from juices and drinks). This volume is quite enough to hold 2 cups of sugar (this is how much sugar is needed for most mash recipes), and the container will not take up much space. The plastic container should actually close tightly. there should be no leakage.
  • Silicone or any other tube (for CO2, silicone is better). The drip tube is excellent for this purpose.
  • Drill with a drill of the required diameter. As a last resort, you can use a nail or screw for these purposes.
  • In the plastic lid of the container, drill a hole with a diameter less than the diameter of the tube, but large enough for it to go through. Use a smaller drill. then you can widen the hole, for example with tweezers. The hole should not be larger than the tube!
  • Cut the tube diagonally and start pushing it through the hole in the cap as shown. On the other side, pinch the tube with tweezers or pliers and tighten. If the tube does not pass you can widen the hole. If the tube passes freely and does not require force to pull it out, then you have made too large a hole and the CO2 gas will escape. If this happens, you need a different container or a different cover. Pull the hose 1-2 cm.
  • If done correctly and the tube fits snugly into the hole, you will not need any glue or silicone. You just need to pour the mash made according to the selected recipe into the bottle and close it tightly with a lid.

The CO2 generator is ready! CO2 will enter the aquarium through the free hole in the hose. However, for better gas diffusion in the aquarium, it is better to use a diffuser of some kind.

  • The simplest, most affordable and cheapest, and most commonly used diffuser is the rowan branch. A branch of the required diameter is placed in the tube and the tube is lowered and fixed in the aquarium (preferably with a suction cup).
  • Another easy way: the tube is connected to the filter, to the hole for the air tube. CO2 gas will be sucked in and its bubbles will be sprayed into the water.
  • You can also use specially made diffusers. whatever you find on the market.

Beginning of work

To start the process of generating gas, you need to press on the bottle (with citric acid). Acid through the first hose enters the soda solution, and a reaction occurs with the release of carbon dioxide. The check valve of the branch pipe does not allow the soda solution under pressure to enter the container.

The evolved gas flows in two directions:

  • into a bottle of citric acid, creating pressure for continuous generation,
  • into the central branch pipe of the tee, through which CO2 enters the aquarium.

With a tap, you can regulate the gas flow. If, instead of a homemade tee, you use hoses from a medical dropper, then an additional gas bubble counter will appear, which is very convenient for creating an accurate CO2 concentration in aquarium water.

DIY aquarium CO2 generator

If you have a small (usually up to 150 liters) plant aquarium, then you can make a CO2 generator yourself. This does not require large costs, just a few simple available materials and mash according to any recipe posted on the Internet.

A DIY CO2 generator is usually very cheap, and most mash recipes use sugar and baker’s yeast. The disadvantage of a self-made CO2 generator is that the wash needs to be changed at least every 2 weeks. during this time, the solution is usually completely “exhaled”.

  • Any plastic container with a tight-fitting lid. Some containers, however, perform better than others. The volume is desirable 1-2 liters (from juices and drinks). This volume is quite enough to hold 2 cups of sugar (this is how much sugar is needed for most mash recipes), and the container will not take up much space. The plastic container should actually close tightly. there should be no leakage.
  • Silicone or any other tube (for CO2, silicone is better). The drip tube is excellent for this purpose.
  • Drill with a drill of the required diameter. As a last resort, you can use a nail or screw for these purposes.

In the plastic lid of the container, drill a hole with a diameter less than the diameter of the tube, but large enough for it to go through. Use a smaller drill. then you can widen the hole, for example with tweezers. The hole should not be larger than the tube!

Cut the tube diagonally and start pushing it through the hole in the cap as shown. On the other hand, pinch the tube with tweezers or pliers and tighten. If the tube does not pass you can widen the hole. If the tube passes freely and does not require force to pull it out, then you have made a too large hole and CO2 gas will escape. If this happens, you need a different container or a different cover.

If done correctly and the tube fits snugly into the hole, you will not need any glue or silicone. You just need to pour the mash made according to the selected recipe into the bottle and close it tightly with a lid.

The CO2 generator is ready! CO2 will enter the aquarium through the free hole in the hose. However, for better gas diffusion in the aquarium, it is better to use a diffuser of some kind.

  • The simplest, most affordable and cheapest, and most commonly used diffuser is the rowan branch. A branch of the required diameter is placed in the tube and the tube is lowered and fixed in the aquarium (preferably with a suction cup).
  • Another easy way: the tube is connected to the filter, to the hole for the air tube. CO2 gas will be sucked in and its bubbles will be sprayed into the water.
  • You can also use specially made diffusers. whatever you find on the market.
READ  How often to clean the filter in the aquarium

The simplest way to supply carbon dioxide

The main element is a vessel (a two-liter plastic bottle, for example) with an ordinary wash. The raw material for fermentation is poured into the bottle:

Raw materials are poured with 1 liter of water, sugar is not stirred. A tube (hose) is hermetically inserted into the bottle cap at one end, and the other end of the tube is lowered into the aquarium water. With the beginning of the fermentation process, the emitted carbon dioxide is discharged into the aqua.

To prevent clots of the mash mixture from entering the aquarium, you can attach a small plastic bottle to the main container and attach 2 more tubes so that gas and fermentation products first enter the small container, and only then into the aquarium.

This method has significant disadvantages:

  • the impossibility of adjusting the amount of carbon dioxide supplied to the aquarium water and the instability of its supply;
  • short operating time of such a system. up to 2 weeks.

DIY CO2 generator

It will take a little more materials and labor to make a workable gas generator with flow control.

The principle of operation of the installation consists in the gradual supply of citric acid from one vessel to another, where the baking soda is located. The acid is mixed with baking soda, and the CO2 released from the chemical reaction enters the aquarium. Consider the manufacturing process by stages of work.

CO2 generator

Building a CO2 generator is a snap. To do this, I took two 1.5 liter plastic bottles and connected them through the holes in the corks with a soft silicone hose. I filled the first bottle with the wash, and the second half filled with water so that when CO2 was supplied to the aquarium, carbon dioxide passed through the water and could be cleaned of the smell of the wash, and also threw off the foam if it suddenly gets into the hose.

And now about the reliability of all connections and fastening of the CO2 generator. Pressure is created in the bottles, and in order to exclude the leakage of carbon dioxide, holes in the bottle caps need to be made much less than the diameter of the hose, and this is done so that the threaded hose fits tightly around the edges of the holes.

You can make holes in the bottle caps with a nail heated over the gas. In the event that you only have a rigid hose or a used silicone hose at hand that has become tough over time, you can process the edges of the holes with a quick glue “moment”.

I tied the CO2 reactor constructed from two plastic bottles with a string and hung it on the wall on a specially fixed hook. The whole structure is hidden behind the aquarium and is not conspicuous.

CO2 atomizer

As a carbon dioxide atomizer, I didn’t get too smart here and used an ordinary fine-pore atomizer for the compressor. But if the bubbles still turn out to be large, you can try to replace the spray bottle with a branch of elderberry, mountain ash, etc., since small gas bubbles always dissolve better in water.

DIY co2 generator

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Soda is source of gas

If you add only 10 ml of sparkling water to the aquarium every morning at the rate of 5 liters of the aquarium, then the volume will be enough for the plants. Of course, this method of CO2 introduction can be used if the used volume of the aquarium is small and is about 50 liters, no more. For large volumes, you will need to make a special carbon dioxide generator.

A container serves as the basis for creating a generator, you can use a 2-liter bottle. The usual wash is poured inside, for which you need:

Ingredients are poured and poured with a liter of ordinary water, without the need to dissolve sugar crystals. Further, a hole is made in the cork, where the hose is inserted and the connection is sealed, the other end of the hoses must be dipped into the water in the aquarium. As soon as fermentation begins, CO2 will be released and, thanks to the tube, immediately fall into the water.

So that the mash itself does not fall into the water, a small plastic bottle can be tied to the main container, into which an additional pair of tubes is mounted. This will allow the carbon dioxide to be separated, and parts of the mash will initially enter the small bottle, and after overflow into the aquarium itself. Due to the design, it will be possible to control the process.

This generator has several significant disadvantages:

  • It is not possible to use a regulator for supplying CO2 to water, and the gas supply itself may be unstable.
  • The period of operation of such a generator is very short, up to 2 weeks, while fermentation takes place. After that, the cooking procedure must be repeated.

DIY generator

To create a CO2 generator that will work normally, and will also have a regulator for the supply of gas to water, you need to spend a little time, in addition, you will need more financial costs, as well as materials.

The essence of the generator and its operation is the gradual introduction of citric acid from one container to another, where the soda will lie. Due to this, the acid is mixed with soda and a chemical process takes place, at this time CO2 is released, which enters the aquarium. The manufacturing process is as follows:

  • Generator creation. To do this, you must use a pair of identical liter bottles with caps. A pair of holes is made in the covers, for further installation a hose. One hose will be installed with a check valve, due to which two vessels are connected. The second hole is required for the installation of the tee pipe, in one part there will also be a check valve. All tubes with valves must be inserted into the second bottle, and a small valve is mounted in the center of the tee for supplying and regulating gas.
  • Reagents. A solution based on water (100 ml) and soda (60 g) should be poured into the first bottle, and a solution of water (100 ml) and citric acid (50 g) is added to the second vessel. The caps should be tightly tightened, and the tubes should have a high-quality seal. It is better to seal the joints with resin, in extreme cases, silicone. The end of the first tube must be lowered into the solutions, and the tubes from the tee must be installed in an empty place in the bottles with solutions. Due to this, there will be a supply of carbon dioxide.
  • Beginning of work. To start gas evolution and the generator to start working, it is necessary to press down the second bottle, which contains acids. Through the hose, the acid will enter the soda solution and the gas evolution reaction will begin. Due to the check valve, the soda will not get under pressure into the vessel with acid.

Gas passes through such a generator in two ways:

  • It gets into a container with acid, making it pressurize for constant generation.
  • In the central part of the tee, through which gas enters the aquarium water.

Thanks to the installed tap, it will be possible to regulate and control the supply of CO2. It is often used instead of a tee of a tube from medical droppers. In this case, it is also necessary to install a gas bubble counter, due to which it is possible to obtain the required concentration of CO2 in water.

Some people who have fish use a special adapter to install an outlet pipe to the outlet of the filter. Due to this, the supplied CO2 is better absorbed by fish and plants.

DIY aquarium CO2 generator

Everyone knows that carbon dioxide is the main component of photosynthesis, due to which flora on earth grows. In addition, CO2 is necessary for the development of plants in water, where the space is closed. Often we are talking about aquariums, where the concentration of carbon dioxide should be 3-7 mg per 1 liter of water. In this case, the development of organisms will be normal. To maintain the proper level of CO2 in the aquarium, there is no need to buy expensive installations, the generator is easy to build by yourself.

Soda is source of gas

If you add only 10 ml of sparkling water to the aquarium every morning at the rate of 5 liters of the aquarium, then the volume will be enough for the plants. Of course, this method of CO2 introduction can be used if the used volume of the aquarium is small and is about 50 liters, no more. For large volumes, you will need to make a special carbon dioxide generator.

A container serves as the basis for creating a generator, you can use a 2-liter bottle. The usual wash is poured inside, for which you need:

Co2 Generator Cylinder System Tutorial | How Much Co2 is Produced? | DIY Co2 vs Pro Co2 for Aquarium

  • Sugar. 0.3 kg.
  • Yeast. 0.3 g.

Ingredients are poured and poured with a liter of ordinary water, without the need to dissolve sugar crystals. Further, a hole is made in the cork, where the hose is inserted and the connection is sealed, the other end of the hoses must be dipped into the water in the aquarium. As soon as fermentation begins, CO2 will be released and, thanks to the tube, immediately fall into the water.

READ  How to feed your fish in an aquarium

So that the mash itself does not fall into the water, a small plastic bottle can be tied to the main container, into which an additional pair of tubes is mounted. This will allow the carbon dioxide to be separated, and parts of the wash will initially enter the small bottle, and after overflow into the aquarium itself. Due to the design, it will be possible to control the process.

This generator has several significant disadvantages:

  • It is not possible to use a regulator for the supply of CO2 to water, and the gas supply itself may be unstable.
  • The period of operation of such a generator is very short, up to 2 weeks, while fermentation takes place. After that, the cooking procedure must be repeated.

Alternative

There are other methods of creating a generator when gas cylinders or containers from a fire extinguisher are used. This method can be used, but without certain knowledge and skills, it is difficult to make a structure. In addition, all work with gas cylinders is a danger and at home it is better not to use this method without experience.

Finally, it is recommended that you read a few important tips:

  • All CO2 generators are always under pressure. The probability that the bottle will burst from the described method is minimal, but if the tube becomes clogged, the probability of an explosion increases, but this is in theory. Some people use a check valve to install it between the generator and the aquarium so that the solution does not get into the water, but this is not necessary, the main thing is not to jerk the bottle.
  • It is impossible to squeeze the containers, because after unclenching the container, water will begin to suck from the aquarium, which will ruin the CO2 generator.
  • The tightness of the structure is a very important point. Even a minimal leak can cause malfunction of the entire system, and solutions in bottles can also rot.

DIY aquarium co2 generator

Required reagents

An aqueous solution of soda (60 g of soda per 100 g of water) is poured into the bottle, and a solution of citric acid (50 g of acid per 100 g of water) is poured into the bottle. Tube caps must be tightly screwed onto bottles.

All joints and holes must be reliably sealed with resin or silicone to avoid gas leakage. The ends of the first hose must be lowered into the solutions, and the left and right tubes of the tee must be installed above the level of the solutions. CO2 will pass through them.

DIY CO2 generator

It will take a little more materials and labor to make a workable gas generator with flow control.

The principle of operation of the installation consists in the gradual supply of citric acid from one vessel to another, where the baking soda is located. The acid is mixed with baking soda, and the CO2 released from the chemical reaction enters the aquarium. Consider the manufacturing process by stages of work.

Soda as a CO2 source for your aquarium

For nanoaquariums up to 20 liters, not everyone wants to communicate with a CO2 balloon installation. You can make a CO2 generator using mash or soda. But you can do it easier. There is an ancient and undeservedly forgotten method of CO2 supply. the use of carbonated water. Sparkling water is a kind of concentrate of carbon dioxide already dissolved in water.

CO2 in soda is usually about 5000-10000mg / l, and after opening the bottle it tends to 1450mg / l. If you calculate how much carbonated water is needed to bring the CO2 concentration in the aquarium to 10 mg / l, then it comes out quite economically. Fresh soda only needs 20ml per 10L of aquarium water, which will give 10mg / L of CO2 in the aquarium. It is enough just to apply soda in the morning along with fertilizers. After standing, you can add soda in large quantities, since carbon dioxide escapes.

Approximately 1 liter of soda is enough for 10-20 liters of aquarium for a month. Any sparkling water will do, except for salt water, of course. It is better to use the cheapest ones. They are usually made from tap water :). It is better not to increase the CO2 concentration by this method to more than 10 mg / l.

First, it is not known how much carbon dioxide your soda contains, 5000mg / L or 10000mg / L. Secondly, large fluctuations in CO2 concentration in the aquarium are not desirable. After adding soda, the concentration will gradually decrease due to the consumption of the aquarium plants. Constant fluctuations of CO2 from 10 mg / l to zero and back are not terrible. But fluctuations from 20-30mg / l to zero are much worse for balance in the aquarium.

  • no need for a reactor to dissolve CO2 and a bubble counter, since CO2 is already dissolved in carbonated water;
  • ease of use;
  • economical in the short term;
  • suitable for nano aquariums.
  • unstable concentration of CO2 in the aquarium;
  • the price of 1 gram of CO2 is the highest of the listed methods, that is, uneconomical in the long term and for large aquariums;
  • poor CO2 supply in comparison with other methods.

A few practical tips:

For most plants, incl. rare and difficult, just a little CO2 feeding is enough, i.e. it is better to underfeed than overfeed. Try to keep the indicator in the green zone.

However, if you suddenly find that the indicator has turned yellow or completely discolored, there is no reason for panic.

If everything is in order with the fish, you do not need to change the water, you can remove the bottle and send it to the refrigerator for a while, the plants will gradually absorb the excess carbon dioxide, watch the fish, indicators often went off scale in my aquariums, especially at first, but not a single case of death of fish from. there was no CO2 poisoning.

When optimal saturation conditions have been found, it makes no sense to shut off the supply of carbon dioxide at night, a small morning excess of CO2 by the evening will be selected by plants, such a regime repeats the daily fluctuations in the gas composition and Ph in natural reservoirs and has a beneficial effect on the growth of all plants.

IMPORTANT: when using external filters or filters of other models as a reactor, in no case supply CO2 BEFORE filtering elements. CO2 should be supplied only AFTER all fillers, otherwise the death of microflora inhabiting the filter materials is possible.

When recharging the bottle, do not hang the free end of the tube over the edge of the aquarium. the pressure of the filter can push the water over the edge and it will flow to the floor.

If you are forgetful, I also advise against using the clamp wheel on the IV tube. If you close it for a long time during fermentation, the increased pressure inside can rupture the bottle.

There is no need to put the bottle on the warm lamps of the aquarium. the fermentation will be too intense and will end in a short time.

If you have several aquariums on your farm, I advise you to equip each of them with its own personal bottle. In my farm there are different aquariums with a capacity of 150 to 400 liters. I recharge all bottles at once, about once every 10-15 days.

Means for monitoring carbon dioxide in the aquarium.

To control the intake of CO2 in an aquarium, there is, in fact, one way. measuring acidity (pH) and carbonate hardness (KH), followed by determining the concentration of CO2 in the water using the table Table of carbon dioxide in the aquarium (CO2, CO2). It is somewhat more convenient to do this procedure using the calculator calculator.php # j One feature is that in our calculator, when entering the pH value, you need to use a period as a decimal point, not a comma.

  • The use of a drop checker (DC) is based on the same principle. DCh is a container, into one part of which a standard indicator solution is poured. water with KN 4, to which an indicator is added. an analogue of the PH test. The second part of the tank is open and aquarium water gets into it. Both parts of the container are designed in such a way that there is always an air cushion between the indicator solution and the aquarium water. A kind of “reverse siphon”.
  • With an increase in the concentration of CO2 in the aquarium water, part of it leaves it into the air cushion, equalizing the partial pressure of CO2 in the water and the air above it. At the same time, CO2 dissolves in the indicator solution, also equalizing the partial pressure. As a result, the concentration of CO2 in the aquarium water and in the indicator solution becomes the same.
  • With a change in the concentration of CO2 in the indicator solution, its pH also changes, to which the indicator reacts by changing its color. By its color, one can judge the concentration of CO2. With a decrease in the concentration of CO2 in water, everything happens in the opposite order. Such a permanent test for pH Do-it-yourself drop checker (DIY CO2 Drop Checker).
  • A very convenient device with one significant drawback. until all the above processes are completed, 2-3 hours pass. the delay time of the DC. During this time, you can put all the fish. Therefore, at the stage of testing the gas supply, I would recommend using tests and a calculator in order to have “instantaneous” values, and use DC for general control in an already established mode.
    Bubble counter.
    To track the amount of CO2 entering the aquarium, a bubble counter is used. a small transparent container filled with water and embedded in the gas supply line. CO2, passing through it, is visually observed in the form of bubbles passing through the water at equal intervals from one another. Selling CO2 balloon equipment, diffusers (St. Petersburg) (fifth photo on the left, seventh photo on the right). Again, I don’t understand why pay, when you can just as well take a dropper filter for this purpose))).
  • It is advisable to install a check valve under the bubble counter. so that in case of a drop in gas pressure, water does not flow down into the tube. A check valve should also be placed in front of a mountain ash branch or a diffuser in an aquarium. Non-return valve in the carbon dioxide supply system for an aquarium
    -Pearling. bubbling of plants. A somewhat subjective method for controlling the m of CO2 in an aquarium.
  • However, the fact remains that an experienced aquarist, knowing the chemical composition of the water in his aquarium and his lighting, by the bubbling of plants, may well draw a fairly accurate conclusion about the concentration of CO2 in the water. over, different plants react to this in different ways.
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    The simplest way to supply carbon dioxide

    The main element is a vessel (a two-liter plastic bottle, for example) with an ordinary wash. The raw material for fermentation is poured into the bottle:

    • sugar. 300 g;
    • yeast. 0.3 g.

    Raw materials are poured with 1 liter of water, sugar is not stirred. A tube (hose) is hermetically inserted into the bottle cap at one end, and the other end of the tube is lowered into the aquarium water. With the beginning of the fermentation process, the emitted carbon dioxide is discharged into the aqua.

    To prevent clots of the mash mixture from entering the aquarium, you can attach a small plastic bottle to the main container and attach 2 more tubes so that gas and fermentation products first enter the small container, and only then into the aquarium.

    This method has significant disadvantages:

    • the impossibility of adjusting the amount of carbon dioxide supplied to the aquarium water and the instability of its supply;
    • short operating time of such a system. up to 2 weeks.

    DIY CO2 aquarium

    Periodic supply of carbon dioxide to the aquarium is necessary because, as a result of filtration and aeration, CO2 in the water tends to zero. And in such conditions, the algae in the fish house can die. The system (or generator) of carbon dioxide gas can be created with your own hands at home. It is not so difficult.

    From school, any person knows that carbon dioxide, the basis of the process of photosynthesis, is absorbed by plants from the surrounding air. Thanks to this, in fact, the growth of terrestrial flora occurs. And in the natural aquatic environment, the concentration of CO2 is sufficient for the development of aquatic plants.

    The same conditions must be created in the aquarium, which is a closed container. Creating a carbon dioxide concentration in the range of 3 to 7 milligrams per liter of aqua is a prerequisite for aquarium plants to feel normal. To do this, it is not at all necessary to purchase industrial carbon dioxide systems.

    CO2 for the aquarium and everything you need to know about it.

    Sooner or later, every serious aquarist is faced with the question of supplying the aquarium with CO2. And for good reason. Why do aquarium plants need it? So CO2. what is it?

    We all know that aquatic plants feed primarily on carbon dioxide dissolved in water. This is CO2. In nature, plants get it from the reservoir in which they grow. Since the volume of water in natural reservoirs is very large, its concentration in them is usually constant. But this cannot be said about aquariums.

    Plants quickly use up all the CO2 gas from the aquarium water, and by itself, its concentration will not be restored, because the aquarium is a closed system. Even the fish contained in it will not be able to make up for the lack of CO2, since they exhale such a tiny fraction of it that it will never be enough for plants. As a result, aquarium plants stop growing.

    In addition to the fact that plants stop growing due to a lack of CO2, water in which it is low has an increased hardness (pH), which is detrimental to them. Even inexperienced aquarists will have noticed that after adding plants, the tap water becomes harder than it was in an empty tank. This is due to the fact that carbon dioxide contributes to the appearance of carbonic acid in the water, and it lowers the hardness. That is, it is important to understand: the less CO2 in water, the higher its pH.

    DIY CO2 ZRDR Generator Kit (unboxing and installing tutorial)

    Required reagents

    An aqueous solution of soda (60 g of soda per 100 g of water) is poured into the bottle, and a solution of citric acid (50 g of acid per 100 g of water) is poured into the bottle. Tube caps must be tightly screwed onto bottles.

    All joints and holes must be reliably sealed with resin or silicone to avoid gas leakage. The ends of the first hose must be lowered into the solutions, and the left and right tubes of the tee must be installed above the level of the solutions. CO2 will pass through them.

    Drinking sparkling water as source of carbon dioxide

    It’s so basic that many aquarists don’t even consider adding CO2 to the water this way. And completely in vain, by the way.

    Common soda sold everywhere contains a significant dose of carbon dioxide (up to 10,000 milligrams per liter in highly carbonated water).

    After opening the bottle, a lot of gas comes out instantly, but still a significant part of it remains in the drink. up to 1500 mg / liter.

    If in the morning you add only 20 milliliters of soda per 10 liters of water to the aquarium water, then this will be enough for the aquatic flora.

    The simplest way to supply carbon dioxide

    The main element is a vessel (a two-liter plastic bottle, for example) with an ordinary wash. The raw material for fermentation is poured into the bottle:

    • sugar. 300 g;
    • yeast. 0.3 g.

    Raw materials are poured with 1 liter of water, sugar is not stirred. A tube (hose) is hermetically inserted into the bottle cap at one end, and the other end of the tube is lowered into the aquarium water. With the beginning of the fermentation process, the emitted carbon dioxide is discharged into the aqua.

    To prevent clots of the mash mixture from entering the aquarium, you can attach a small plastic bottle to the main container and attach 2 more tubes so that gas and fermentation products first enter the small container, and only then into the aquarium.

    This method has significant disadvantages:

    • the impossibility of adjusting the amount of carbon dioxide supplied to the aquarium water and the instability of its supply;
    • short operating time of such a system. up to 2 weeks.

    Creation of the apparatus

    Take two identical liter plastic bottles. It is necessary to carefully drill 2 holes in the caps with a wood drill for the subsequent installation of the tubes (hoses). One tube with a non-return valve connects the container to the container.

    A tee tube is inserted into the second holes of the caps, one branch of which also has a check valve. Hoses with non-return valves must be inserted into the container, and a small cock is installed on the central branch of the tee to regulate the flow.

    DIY CO2 aquarium

    Periodic supply of carbon dioxide to the aquarium is necessary because, as a result of filtration and aeration, CO2 in the water tends to zero. And in such conditions, the vegetation in the fish house slows down its development. The system (or generator) of carbon dioxide gas can be created with your own hands at home. It is not so difficult.

    From school, any person knows that carbon dioxide, the basis of the process of photosynthesis, is absorbed by plants from the surrounding air. Thanks to this, in fact, the growth of terrestrial flora occurs. And in the natural aquatic environment, the concentration of CO2 is sufficient for the development of aquatic plants.

    The same conditions must be created in the aquarium, which is a closed container. Creating a carbon dioxide concentration in the range of 3 to 7 milligrams per liter of water is a prerequisite for aquarium plants to feel normal. To do this, it is not at all necessary to purchase industrial carbon dioxide systems.

    DIY CO2 generator

    It will take a little more materials and labor to make a workable gas generator with flow control.

    The principle of operation of the installation consists in the gradual supply of citric acid from one vessel to another, where the baking soda is located. The acid is mixed with baking soda, and the CO2 released from the chemical reaction enters the aquarium. Consider the manufacturing process by stages of work.

    Beginning of work

    To start the process of generating gas, you need to press on the bottle (with citric acid). Acid through the first hose enters the soda solution, and a reaction occurs with the release of carbon dioxide. The check valve of the branch pipe does not allow the soda solution under pressure to enter the container.

    The evolved gas flows in two directions:

    • into a bottle of citric acid, creating pressure for continuous generation,
    • into the central branch pipe of the tee, through which CO2 enters the aquarium.

    With a tap, you can regulate the gas flow. If, instead of a homemade tee, you use hoses from a medical dropper, then an additional gas bubble counter will appear, which is very convenient for creating an accurate CO2 concentration in aquarium water.

    Alternative installations

    There are also ways to supply CO2 from special gas cylinders or using fire extinguishers. Some craftsmen implement such methods.

    The supply of carbon dioxide to aquatic flora is the key to their normal growth and life. To ensure this process at home, a minimum of improvised material, a little persistence and very small financial costs are enough.

    Video: creating a CO2 reactor for an aquarium with your own hands.

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