home Aquarium How to make clean aquarium water

How to make clean aquarium water

Beneficial bacteria

Certain strains of bacteria can also be added to aquarium water to help purify it. The bacteria are sold in small bottles of liquid. By adding the required volume of liquid to the aquarium, according to the instructions, the bacteria immediately begin their work, neutralizing waste and purifying the water. The effect of adding beneficial bacteria to the water is especially noticeable when starting up a new aquarium when the water becomes very cloudy.

make, clean, aquarium, water

Fish have a big impact on the water quality in an aquarium. For example, goldfish and cichlids constantly rummage in the ground in search of food and raise a lot of dregs. In an aquarium with such fish, you need to perform enhanced filtration with powerful water filters.


Crystal clear water in an aquarium is the goal of almost any aquarist. If the aquarium is not properly maintained, the water in it can become cloudy, and its walls and decorations will be covered with algae. Dirty aquariums are one of the reasons many inexperienced aquarists give up their hobby. Keeping the aquarium clean will not only allow you to enjoy watching what is happening behind the glass, but also such an aquarium will become the subject of your pride and envy of your friends.


Excessively bright and prolonged lighting of the aquarium can cause the water to bloom and turn green. Tiny, single-celled algae float in the water, feeding on light and nutrients, giving the water the look of a pea soup. If the turbidity of the water is caused by a green tint, it is almost certainly due to light and algae, and the first thing to do is to reduce the amount of light.

Ultraviolet water purifiers give good results against green water. In such purifiers, water passes through a tube in which an ultraviolet lamp is installed. Ultraviolet rays disinfect water by destroying all algae spores in it. This lamp is very efficient, but relatively expensive. If you need to get a faster effect and at the same time cheaper, then use a flocculant, as recommended above.


The food you feed your aquarium dwellers also affects the clarity of the water. Coarse, protein-rich foods such as flakes, granules, tablets, frozen bloodworms and mussels can cause suspended particles, also called fines, that impair the quality and clarity of the water.

Be careful not to overfeed the fish, remove all uneaten food from the bottom in time. Only in this case will the water remain crystal clear.

Water change

Maintaining and changing some of the water in your aquarium is one of the best ways to achieve and maintain water quality at the proper level. Regularly clean the filter elements of the water filter, siphon the soil, removing uneaten food and waste products from the bottom from the bottom, which could otherwise lead to cloudy water. A weekly change of part of the water reduces nitrates in it and helps to stabilize its acidity pH.

A good short-term way to get crystal clear water in your aquarium. it is to use a flocculant. Flocculants purify water by gathering tiny particles together to form larger particles, which can then be effectively removed by filtration.

How to Keep CRYSTAL CLEAR water in your AQUARIUM/ Clean Fish Tank Water


Filtration is the main way to purify aquarium water. Filtering can be divided into three different types. mechanical, biological and chemical, and mechanical and chemical filtration functions inseparably from each other.

Mechanical filtration refers to the physical trapping of dirt and debris. Dirt particles suspended in water are sucked into the filter, where they are retained by a sponge, filter wool or a combination of both. The finer the sponge, the finer particles it will catch.

Make sure your filter is the right size and performance for your aquarium. Determine the length and volume of the tank and select the appropriate filter model, i.e. For an aquarium with a volume of 180 liters, you will need a filter for aquariums with a volume of more than 180 liters and nothing less. Only in this case it will be possible to filter water efficiency.

Rinse the filter material regularly in running water, as the filter sponge becomes clogged with dirt during operation and the filter performance is significantly reduced.

Chemical filtration

Chemical filtration works by absorbing or adsorbing the finest particulate matter from the water. Carbon (charcoal filter). by far the most famous chemical filter material, widely used to obtain crystal clear aquarium water. The crushed charcoal is capable of absorbing odors and harmful substances dissolved in the water, making it crystal clear. The charcoal filter is sold in the form of mesh bags or specially impregnated filter sponges, in various sizes for certain brands of water filters. The charcoal filter must be replaced at least once a month, as it becomes saturated with harmful substances and loses its effectiveness.

Chemical composition of blue clay

Blue clay is a sedimentary rock, a natural source of such elements as silicon (30-70%), aluminum (10-40%), titanium, iron, calcium, potassium. In addition, there are admixtures of fragments of minerals and rocks, plant and animal remains, carbonates, etc. Blue clay is the most mineralized. It is also an excellent absorbent and antiseptic, does not sour in the aquarium.

Blue Dolphin :. compatibility, breeding, photo-video review

Blue dolphin Cyrtocara moorei, cyrtocara moorii
Order, family: cichlids (Cichlidae).

Comfortable water temperature for keeping the Blue Dolphin:

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Blue Dolphin Compatibility: Small and Medium Cichlids, Large Barbs, Catfish.

Personal experience and tips: Beautiful fish. A large aquarium is required for comfortable keeping. Compatibility with other types of fish is limited, a fish of the cichlov family (Mbuna), no matter how. But, at the same time. this is perhaps the most modest type of cichlids, the “spirit of the Malawians” in them is zero. To date, I have a couple of these handsome men. they sit in a corner, shy away with sudden movements and sounds, they fall from the siphon of the aquaruim into a moron state)))

In nature, it lives in the shallow sandy regions of Lake Malawi in Africa. Due to the strong similarity of the shape of the head and mouth with a mammal, it got its name. Introduced to Europe for the first time in 1968.

The blue dolphin aquarium fish has a tall, slightly elongated body, flattened on the sides. The head is large, the eyes are large and mobile, the lips are thick. The adult male has a large fatty build-up on the forehead. The back and anal fins are long, the tail is two-lobed. The pelvic and pectoral fins are thin and short. Adults and juveniles can be distinguished by color. Juveniles are colored gray-blue with a silvery sheen, with dark transverse stripes on the sides. In the center of the body and on the caudal peduncle along a large dark spot. In adults, the color is velvety blue. The dominant male turns dark blue when excited. During spawning, his forehead turns yellow, and 5-7 dark blue transverse stripes appear on the side. All fins are blue. As a rule, the male is larger than the female. In nature, the blue dolphin can reach 25 cm.Life expectancy up to 15 years.

The blue dolphin is a territorial, shy and peaceful fish. But, males periodically argue among themselves for leadership, without causing serious damage to each other. Dolphins are shy (even in the vicinity of African cichlids), therefore it is recommended to keep them in a species aquarium in a ratio of 1 male and 2 females or 2 males and 3 females. They stay in the middle and lower layers of water.

It is best to keep a blue dolphin if you have a spacious aquarium with a volume of 200-250 liters. with sandy ground, numerous shelters (cracks and grottoes made of stones) and free swimming area. If you are placing plants in the aquarium, then you need to take only hard-leaved plants with a good root system or in pots. Water parameters for the correct keeping of the blue dolphin: hardness 5.20 °, pH 7.2-8.5, temperature 24. 28 ° C. Powerful filtration, aeration and weekly water changes up to 30-50% of the water volume are recommended. Blue dolphins reach sexual maturity at the age of 12-18 months with a length of 13 cm. Reproduction and spawning are similar to most Malawi cichlids and do not present any particular problems.

Feeding aquarium fish should be correct: balanced, varied. This fundamental rule is the key to the successful keeping of any fish, be it guppies or astronotuses. The article “How and how much to feed aquarium fish” tells in detail about this, it sets out the basic principles of the diet and feeding regime of fish.

In this article, we will note the most important thing. feeding the fish should not be monotonous, the diet should include both dry food and live food. In addition, you need to take into account the gastronomic preferences of a particular fish and, depending on this, include in its diet food either with the highest m of protein or vice versa with plant ingredients.

Dry food is, of course, a popular and popular food for fish. For example, every hour and everywhere you can find food on aquarium counters. the leader of the Russian market, in fact, the range of food of this Tetra is included as individual food for a certain type of fish: for goldfish, for cichlids, for loricaria, guppies, labyrinths, arowans, discus, etc.d. Also, the Tetra company has developed specialized feeds, for example, for enhancing the color, fortified or for feeding fry. Detailed information about all Tetra feeds, you can find on the official website of the company. here.

It should be noted that when buying any dry food, you should pay attention to the date of its manufacture and shelf life, try not to buy food by weight, and also keep the food closed. this will help to avoid the development of pathogenic flora in it.

Complete Aquarium fish tank clean out step by step guide

Aquarium lighting

If the aquarium is on the window, people often think: there is enough light in it. But this is true only for summer: the winter day is short, and even in the lightest window, plants either slow down their growth in winter, or simply die. It should always be summer in the aquarium, so the daylight hours should be at least 14-15 hours.

Light bulbs are best placed on top, covering them with reflectors. However, all common aquarium fish, except for the haracin fish, live well in side light. Therefore, beginners can be advised to place the lamp on the side, pressing it against the glass below the water level. If you have two aquariums, clamp the lamp between them. Do not be afraid, the glass will not burst: “accidents” of this kind only happen when the lamp is too high. Select the lamp power based on the calculation of 10-15 watts per bucket of water. This calculation is also suitable for those aquariums that do not receive daylight at all. If the lamp is located on top, its power should be increased by 20-25%, and when the lamp (subject to adequate insulation) is immersed in water. It can be half as much. This applies to incandescent lamps. Daylight and white light tubes are usually placed on top. Successful aquariums with this kind of lighting are rare.

Article Cloudy, frothy and foul-smelling aquarium water

With chemical pollution

In case of chemical pollution, the best option would be to replace part of the water with another, but of high quality. It can be water from another aquarium, and maybe settled water.

If the water is not aquarium water, then it is better to make changes in small portions within 2-3 days. This is done so that the fish do not experience stress when the composition of the water changes.

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Action in case of cloudy water

It so happens that the water becomes cloudy. The reasons may vary. The problem is solved without harming the inhabitants.

This is mainly true for beginners. They can’t wait to set up the aquarium soon. They often pour tap water into it, which has not even had time to settle. The result is that the water becomes cloudy. The reason for this is a situation in which the biological balance is disturbed. Before the water must “ripen”.

At first, not fish are launched, but plants, and then, after a few days, fish can also be planted. If the aquarium has been in operation for a rather long time, and it is difficult to call quality care for it, then this can cause bacteria to multiply intensively. In this case, the fish are set aside, and the aquarium itself is given a “general cleaning”. The aquarium must be thoroughly washed, water changed, and excess plants removed. Then you need to pour settled water into it and only after a few days start the fish.

Sometimes the reason is that there is a lot of dry food left. In this case, they switch to live food using bloodworms.

If there is poor lighting, the water turns green. This is due to the fact that algae begin to multiply too intensively. In this case, the water is changed by one third weekly. A good point is the presence of fish, which will use algae for food.

The water should never be completely changed. An exception is the presence of emergencies. Do not forget to clean the soil and filter the water.

how to prepare an aquarium for fish stocking

Decorating the bottom of the aquarium

If you want to use sand as a soil, be sure to sort it out, removing all dirt, pebbles, etc. (at the exit you should get clean, uniform sand), rinse it in running water until the water becomes completely transparent, then boil and rinse again with running water to secure.

At first, do not use clay and peat (used in aquariums with live plants), otherwise it will be very difficult for you to keep the aquarium clean, but do not worry, you will learn this in the future.

Do not fertilize the soil in the aquarium under any circumstances, this is not necessary if you do not have live plants. Such an experience not only will not bring any benefit, but will most likely harm the inhabitants of the aquarium, in the form of an outbreak of unwanted algae (water bloom).

How to plant plants correctly

For the transparency of the water, it is advisable to plant plants that are easy to maintain, which do not pollute the water space and take root in the new soil. Among them:

  • Gigrofila;
  • Fern ceratopteris;
  • Vallisneria;
  • Peristle;
  • Ludwigia;
  • Sagittarii;
  • Ambulia.

See How To Plant Aquarium Plants.

Plants are recommended to be planted with bushes of the same variety. this way they grow better. Vallisneria should not be planted next to other species. To avoid cloudy water, plant the plants first and then add water to the tank. Seedlings should be placed in a recess, lowering the roots into the ground, and covering them with sand.

About decorations

The cleanliness of the aquarium decoration also affects the quality of the water. Rules to follow when installing jewelry in a container:

  • All decorations (grottoes, caves, coconuts, driftwood, castles, labyrinths) must be treated from dirt and parasites in infused water (leave them for 3-4 days).
  • If you are decorating the bottom with stones, make them red or black. However, the stones must be washed carefully, it is advisable to boil them. The calcium and magnesium in the stone that increase the hardness of the water spoil the parameters of the reservoir.
  • Place stones in the poured water so that they “take root” there.
  • Cover the aquarium with a lid. until fish live in it, it will be saved from dust and insects, and a film of cyanobacteria does not form on it.
  • After installing the scenery, start the fish in 2-3 days until the water in the aquarium has settled, establishing biological equilibrium.

See how to prepare snag for an aquarium.

Primordial purity

To get clear water, you need to clean the tank with table salt. it neutralizes bacteria, the glass walls will acquire a shine. After washing, rinse the container with tap water using a hose.

  • Never fertilize the soil with peat, clay, silt, black earth and other fertilizers! It will pollute the body of water.

The secret of cleanliness of “living” water

Many novice aquarists make a mistake when, after the first days of launching a reservoir, they begin to worry about the formation of turbidity and foam in it. It was bacteria that got into the aquatic environment from the air. Then the owners of the aquarium begin to change the water and do other procedures with it. Better to wait 5-6 days and the cloudiness will disappear. Otherwise, there really is something wrong with the water.

Having gained patience and having waited 6 days, you will find clear and slightly yellowish water in the tank, which in professional circles is called “living”: ciliates and organic matter appeared in it, but there are almost no bacteria, ciliates neutralized them.

Such water is a guarantee of health in the aquarium, it can not be completely changed for several years. If this water is renewed more than half, bacteria will appear in it, provoking turbidity.

How to make crystal clear aquarium water?

Filters to help purify water

A biological, that is, a living filter, is a plant that is planted in a lighted place. Infusoria and microworms that feed on bacteria develop well in them. The thickets also retain dirt and cloudiness in the aquarium with their stems and leaves.

Excellent “filters” are bottom fish (catfish) and snails that eat carrion. Based on observations, a coil snail is able to make water absolutely clean in a matter of days. This is probably the most affordable “filter” for a water tank. Just be careful. some species of fish and amphibians are not averse to feasting on it.

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Another representatives of the underwater world that are able to cleanse the environment in an aquarium are bivalve mollusks. Pea and sharovka love warm water, and toothless and pearl barley love cold water. Unfortunately, like snails, these molluscs can be eaten, so before you let them into the tank for “cleaning”, it is better to evict the rest of the pets from it. Also, the larvae of toothless and pearl barley parasitize fish. Most likely, after cleaning the reservoir, the aquarium will have to be quarantined.

The Spur frog is a vertebrate amphibian that will bring the aquarium to transparency. She can constantly live in a nursery with small fish, while helping the water to renew itself. The frog always lives in the water, but if it brings fry. and there are a lot of them, the aquarium “jungle” will not rest. Keep a close eye on the water parameters in the aquarium: regularly renew the water, plant the right plants, put “orderlies” in it, then it will acquire a wonderful appearance and a healthy balance.

TetraAqua CrystalWater

Suitable for freshwater aquariums. It “binds” the smallest particles floating in the water into larger ones, which can be captured by filters of any type. Either they settle to the bottom, then are removed by a siphon.

Differs in speed. the first positive changes are noticeable after 2-3 hours, after 8-12 hours the water becomes crystal clear.

The preparation is suitable for water of any hardness, does not change its chemical parameters. It is colored yellow, so after applying it, the shade of the water also changes for a short time, this is normal.

The agent is effective for turbidity caused by a violation of the microbiological balance, the development of pathogenic microflora, improper water replacement, the presence of organic waste.

What is this water?

The crystal clearness of water is understood as its transparency. This physical indicator is determined by the absence of suspended matter and impurities.

The water should not be cloudy, yellowish or greenish. It is not considered crystal clear and water with a film, a layer of mucus on the surface.

What determines the parameters of purity and transparency?

The purity and clarity of the water in the aquarium depends on many criteria:

  • Volume. The smaller the container, the faster the water evaporates and becomes cloudy. Optimal volume. from 100 l.
  • The number of fish. The more “overpopulated” the aquarium, the faster the water becomes polluted with fish waste products, other organic waste. As a result, it becomes cloudy, a film appears on the surface. Average volume of water per fish. 5 l.
  • The quality of the filtration system. In this case, the filter type is not essential. It can be mechanical, chemical, biological, mixed.
  • Light and temperature conditions. Bright light and warmth provoke the active development of microflora, the water begins to “bloom” and become cloudy.
  • The presence of algae, snails. Many of these are useful as “live filters”, but it’s important not to overdo it here. An excess of algae simply interferes with the movement of fish in the aquarium, and the waste products of many snails greatly exceed the amount of organic matter they have processed.
  • Regularity of water changes according to the “age” of the ecosystem. This is the only way to maintain its optimal biobalance, otherwise the water will inevitably become cloudy, despite the presence of “biological” and other filters, the use of special preparations.
  • The quality of the water itself. To maintain transparency, tap water needs preliminary preparation before it can be poured into the aquarium. The most popular way is to defend it.
  • Also, only fish should live in the aquarium. Acceptable “neighbors” for them are only snails. For turtles, newts, Cuban frogs, you need to purchase a different container.

How to keep it clean?

To maintain the crystal clear water in an aquarium, in addition to the activities described above, experienced aquarists recommend the following measures:

  • Place a suitable lid on the aquarium to keep out dust and dirt. But at the same time, for normal air exchange, it is necessary to leave a small gap.
  • Constantly monitor the “population density”.
  • Ration feed. The required portion for a “one-time meal” is easy to determine empirically and in the future to adhere to it.
  • Regularly inspect the aquarium, monitor the state of the ecosystem, immediately get rid of dead algae, dead fauna. Also, you must not allow any objects, substances not intended for the aquarium to get into the water.
  • Everything that is planned to be placed in the aquarium (soil, decorative elements, new algae) must be thoroughly rinsed before this, if it is permissible. also disinfected (for example, in boiling water).
  • Monitor the temperature regime and the duration of the “daylight hours”.
  • Planting algae that are easy to maintain, not prone to active growth and capable of purifying water. for example, hygrophila, vallisneria, ambulia.

Useful video

An experienced aquarist shares his secrets:

Mechanical filtration

Filtration is the “basic” method of water purification in an aquarium. Mechanical filter helps get rid of dirt and other debris.

All this is inevitably present in the water in the form of suspension and creates turbidity.

It sucks in water inside, particles are retained in the layer of a sponge, filter wool. The smaller it is, the better the cleaning is done.

All that the aquarist needs to do is select a filter whose size and performance match the size and volume of the aquarium. Only in this case it is possible to achieve crystal transparency of the water.

Beneficial bacteria

They are most often used when starting up a new aquarium when the water inevitably becomes very cloudy. Bacteria allow the biobalance of the new ecosystem to settle down much faster. in 7-10 days instead of 2-3 months.