home Aquarium How to change the water in a large aquarium

How to change the water in a large aquarium

How to change the water in an aquarium?

An aquarium with fish in the house gives peace and tranquility to the owner. Floating exotic fish are aesthetically pleasing to the eye and decorate any interior. Unlike other pets, they do not shed, they do not need to be walked, they do not sharpen their claws on furniture or gnaw on shoes. Nevertheless, aquarium fish also require care and maintenance. In order for the fish in the aquarium to live comfortably, so that they do not get sick, you need to pay considerable attention to their habitat, that is, water.

Purification of water in the aquarium

In addition to the unaesthetic appearance of dirty and muddy water in an aquarium, over time it becomes saturated with toxins, which affects the health of the fish. Therefore, for constant easy cleaning, it is imperative to use filters. A standard filter is a pump that pumps water through a porous filter material. This material traps pollutants. Such filters carry out only mechanical water purification: they rid the aquarium of fine litter lying at the bottom or located in the water column (dead food organisms, fragments of dead leaves, excrement).

For chemical cleaning, as an option, activated carbon is used. It absorbs substances dissolved in water. Coal is placed in filter cassettes behind a layer of foam rubber. This process is more important for fish, as aquarium plants themselves are excellent biological and chemical filter feeders.

Changing the water in the aquarium

One of the important questions when cleaning an aquarium is how much water to pour into the aquarium when it is replaced. In the process of life, aquarium fish create a certain microflora in the water. Therefore, you should completely change the water only in extreme cases: when the water in the aquarium blooms, when unwanted microorganisms are introduced into the water, when fungal mucus appears or when the soil is very dirty. In other cases, the water changes only partially. 10-20% of the liquid every two weeks.

Novice aquarists may not always know what water to put in an aquarium and how to prepare the water for an aquarium. This is a fairly straightforward process. Preparation of water for an aquarium consists in settling it. It is necessary to collect the required amount of cold tap or well water in a clean enamel or glass container and let it stand for 3 days. During this time, chlorine and other harmful substances will evaporate from the water, and its temperature will become optimal, the same as in an existing aquarium.

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To pump out the required amount of water from the aquarium, you can use a conventional flexible tube or a special pump. If using a tube, lower one end of the tube into the aquarium and the other into a bucket below the level of the aquarium. Then suck in air from the tube with your mouth until water runs down it, and quickly lower the end of the tube into the bucket.

A vacuum pump is the perfect way to change the water in your aquarium. This is a kind of siphon, which consists of a hollow cylinder and a long narrow tube. The cylinder must be placed in the aquarium, and the tube must be fixed in a special container above the water. This method helps not only to accurately measure the amount of drained liquid, but also removes plaque from stones at the bottom of the aquarium. In addition to vacuum pumps, there are also electric pumps, but they are needed only in cases where the volume of water to be exchanged is very large. For example, in the case of a floor-standing aquarium.

An important rule when changing the water in the aquarium is to never change the water if the fish are sick. The risk of fish death in this case is very high.

change, water, large, aquarium

HOW TO DO a water change on any BIG Aquarium!!

Surround your fish with care, adhering to simple rules, and they will delight you for a long time.

Perfect formula for water changes

An ideal aquarium water change should follow a formula: the benefits of this procedure should balance that stress. Which causes a sharp change in the chemical composition of the water in aquarium inhabitants. If the chemical parameters of the water that you are going to add to the aquarium correspond to the water that is contained there. Then you can change even half of the entire aquarium. And this will not end with stress for the fish. But the identity of water to such an extent is very difficult to achieve. So it is unlikely that it will be possible to deceive the aquarium inhabitants, since they very subtly feel a change in the level, for example, pH. If the difference in this level is even one, then you will already put the pet into a state of anxiety.

In general, a water change is a way of treating many diseases, as well as their prevention. Even if the condition is critical in the aquarium, it can be leveled with water replacements. Aligning the parameters of the replaced and replaced water is a very difficult and troublesome business. But as a result of this, you can change a large amount of water at any time. In particular, no risk to the life and health of the aquarium inhabitants. Experts say that this is how the aquarium is set up. Artificial conditions for keeping fish require constant intervention from humans. The first and most necessary intervention is to maintain a constant water level. Remember that aquarium fish are living things that require your attention and patience. You need to intervene in their life wisely and with the same patience. For this they will thank you with a beautiful healthy look and cheerful behavior.

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Eliminate tank contaminants.

No one wants to think of their aquarium as underwater pollution, the equivalent of a hot day along I-405 in Los Angeles. However, your aquarium does attract some potentially harmful nitrogenous contaminants. What is it, you ask? These are mainly nitrogen compounds.

In general, your aquarium is not capable of handling nitrate compounds in an efficient or fast manner. So what’s the harm in suboptimal nitrate levels? Excessive levels pose a serious risk to tank dwellers, making them vulnerable to disease, increasing stress and stunting development; this risk is even greater in reef aquaria, as even relatively low nitrate levels can impair reef health.

From a river, a well, a lake

Many people think that a well, river or lake environment is great for aquarium fish. But this is a big mistake.

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Most of these waters come from the surface layers of the soil, which can contain harmful chemical compounds and toxins. If the dissolved amount of these compounds is permissible for humans, then for fish it is fatal.

In addition, such water contains nitrates, phosphates and other compounds, which they seek to get rid of.

If you are sure of the quality of river, well or lake water, then before pouring it into the aquarium, you need to settle the liquid for 5 to 7 days, as well as conduct tests and find out the exact water parameters.

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The optimum temperature for most aquarium fish is 22-26 degrees. Room temperature liquid is achieved by settling it in the room. At the same time, it is not recommended to put the aquarium in the winter near a window, batteries and heaters. This can provoke a sharp temperature drop in the aquarium and lead to the death of residents.

To keep the temperature at a familiar level in a cold room, use aquarium heaters.

How to add live plants to your aquarium. step by step guide

In this guide, we’ll show you step by step how easy it is to add live plants to your aquarium.

Live plants are great because there are many benefits to having them in a fighting fish tank.

How To Do Water Changes on BIG Aquariums

They primarily help maintain optimal water conditions by converting harmful chemicals into oxygen, but they also reduce algae growth, look fantastic, and are better suited for cockerel fins (as opposed to sharp-edged plastic plants).

what rules are recommended by experts?

Changing the water in an aquarium is a relatively simple and quick process. Quite often, aquarists, especially beginners, believe that replacement will necessarily take a long time and as a result, the apartment will be a mess, a sea of ​​water and a lot of scattered things. But, fortunately, things are not so sad. It is enough to purchase the necessary tools and know some of the rules.


We recommend adding antichlorine (and adding it yourself) when changing 50% of the aquarium water. It is especially important for us when we transport an aquarium. Then we use it constantly. If you change part of the water in the aquarium, you do not need to use the preparation. Antichlor is rather a commercial name. It binds chlorine, but its great function is that it reduces stress on the fish. it contains aloe extract. The fish turns out to be more “prepped” and easier to tolerate the change of environment.

We have a long experience, so we can say that there is a chance in Kiev that after a water change something will happen to aquarium fish 1 time in 8 years. This is 1 time for more than 200 changes of aquarium water. This happens especially in the spring.