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Is it possible to pour filtered water into the aquarium?

maintenance, care, compatibility

Many people who decide to start an aquarium want to know all the details about keeping fish, choosing plants and caring for water. But the first dilemma faced by an inexperienced aquarist is how much water should be poured into the aquarium?

There are a number of requirements for water quality and several ways to clean it, which will help to achieve the desired consistency.

For the aquarium should be selected soft neutral water. In large metropolitan areas such water flows in the aqueducts. In places where the water supply is connected to artesian wells, the water turns out to be too hard.

It is suitable only for viviparous fish, adapted to all sorts of adversity.

Too hard aquarium water can be softened by mixing it with soft distilled or rainwater. Water from melting snow / ice is also suitable.

And collect rainwater and ice after continuous, long-term precipitation. To replace the water in the aquarium, you can mix 1/4 of rainwater.

If you decide to use tap water, then follow these guidelines:

  1. Do not pour water from the tap. Pour it into the jar, you can see that its walls will be covered with bubbles. These are gases. They got into the liquid when it was passed through cleaning filters. Having put a small fish in such water, you risk that its body and gills will be covered with bubbles, and ulcers will form on the affected areas.
  2. Ensure that the water is free of chlorine.. If the water contains more than 0.1 milligrams of chlorine, the young fish and larvae will die in a couple of hours. A concentration of 0.05 milligrams of water will kill fish eggs.
  3. Monitor pH. Changes in the pH level are often observed in an artificial pond with soft water and low carbonate content, with strong sunlight. To remove the free acid, you need to blow the water column with air and deliver the water to the aquarium in batches, and the pH should not be less than 7.

If you follow these indicators of water in the aquarium, then it will not be green for a long time, and the fish and plants will fully develop.

Little just prepare the water and pour it into the aquarium. Her follow-up care is required. which involves filtering and ozonation. The most common filter types are:

  1. Internal. The most budget, and therefore a common option. It is a pump that distills the liquid through a foam sponge filtering composition.
  2. External. They are often bought for large volumes. They do not take up extra space inside the aquarium and have large volumes of filter materials. Sterilizers are also installed on the external filter.

As you can see, collecting water for the aquarium and its further control is a simple process.

There is no absolutely pure water in the world, it is mined in laboratories using step-by-step distillation. Water from a water supply system or natural source always contains impurities of various substances that play an important role in the ecosystem.

Considering that many modern people keep fish at home, everyone wants to use the highest quality water for them. But what should be the water so that it can fill the home aquarium?

For a long time it was believed that spring water, recruited from a crystal clear stream, is best suited for ornamental freshwater fish. Perfectly clean, transparent, odorless and dirt free – that’s exactly the kind of tank you can fill! It turned out that typing this is not always safe.

Its difference from tap water is high rigidity. Even the soap in it is difficult to dissolve, what can we say about fish food. Due to the high content of magnesium and calcium salts, it has a detrimental effect on the health of the fish and their offspring (eggs).

Unfortunately, the water from the spring is not recommended to add to an artificial aquarium. Occasionally it is mixed with water to increase rigidity.


Since the springs have increased hardness, can it be better to pour soft water into the tank – rainwater or distilled water? Again, not always – just mixing it with the plumbing.

There are fish that love the environment with softened water, but many freshwater species still prefer medium, neutral water. Such water flows in domestic rivers and lakes – you can pour it purified into the aquarium, filling it with not all the space.

Watch the video on how to change the water in the aquarium.

What habitat most love aquarium fish

What water is needed for an aquarium? Combining water from different sources, it is impossible to achieve the ideal parameters.

How many fish, so many requests. Some fish can live in the melt water of mountain lakes, others – in the brown marsh.

In the first case, the water is very hard, in the second – soft. Fish have to settle in a different environment.

It turns out that some fish are orderlies who love rotten water, others do not tolerate such parameters. Rotten environment is detrimental due to humic acids. Many freshwater biotopes of our country have pH neutral water, medium acidity, low alkalinity.

For most aquarium fish, it is suitable.


Water that must be prepared for not very capricious ornamental fish requires preliminary preparation. In the general aquarium it is necessary to fill in soft (sometimes medium hard) pH-neutral water.

This can be plain tap water. In it, live-off and viviparous fish, which perfectly adapt to different conditions, take root well.

See how to change the water and care for the aquarium.

The degree of hardness can be measured using litmus paper, the temperature of the water – with a thermometer. Water of high degree of hardness is recommended to be mixed with soft rainwater (filtered) or distilled.

Also, water from clean, melting snow or ice. The listed types of water can be collected in a clean container only after prolonged precipitation; it is enough to pour 30% soft water into infused water from the tap.

Water from the tap can not be poured immediately. It is better to pour it into a glass, and see if the glass is covered with bubbles, whether a strong smell will emanate. Such water is saturated with compounds of gases that fell into it during filtration at the treatment plant.

Having let the fish in such a liquid, the pet’s body will instantly become covered with bubbles, which will penetrate into the gills and internal organs. As a result, the fish will die.

In addition to gas, chlorine is added to water for disinfection, it will also poison living beings.

To get rid of gases, tap water can be poured into glass containers, and let it settle there for several days (2-3 days). There is another quick way: pour water into enameled ware, bring it to the stove to 60 or 80 degrees, set aside and cool. Boiled water is harmful – it leaves on the walls of dishes scale calcium carbonate and magnesium.

Boiled water can be poured into spawning, but in extreme cases. To fill the entire area of ​​the aquarium with boiled water will take a long time.

Another nuance – boiled water kills all the useful microflora.


If you do not have water supply (this occurs in our time), you should go to a clean river or lake (where there are no signs “No swimming!”, Etc.), and take water from there. If it is clean, river fishes (perch, bream, roach) really live and flourish in it, there is a water grid plant, which is a good sign.

To destroy parasites, such water is heated in an enamel pot to 80-90 degrees, but not to make boiled water out of it. The parameters it will be different from the liquid from the tap, so think about whether to take such a risk.

You can go to another house, and get running water there.

In addition to thawed, spring, rain and distilled water, it is advisable to pour 30% of the water from the old aquarium to the infused liquid from the tap. If he was kept safely, the fish and plants did not hurt there, the water in him was not muddy – this is a find.

In the old (residential) aquarium water, whether it has been poured from a tap for a long time, there are many useful microbacteria that will create in the new dwelling the natural biological environment. In a residential aquarium environment contains a number of organic impurities that are very useful for the aquatic environment. They make the water more acidic, do not allow the putrefactive and pathogenic bacteria to multiply.

If high-quality and proven water is poured into the tank, all its inhabitants can be healthy.

Boiled, melted or distilled water for aquarium

Boiled melt or distilled water

for aquarium

Everyone knows that before you pour water into the aquarium, you need to defend it for at least one day. But, there are other ways to prepare aquarium water – this is boiling, freezing and distilling.

We will talk about them in more detail.

So, all the above-mentioned methods of preparing aquarium water are as effective as sludge of tap water. Moreover, these methods make the water “soft” – i.e. significantly reduce the rigidity of the aquarium water, as well as killing harmful bacteria and other filth.

Boiled aquarium water The procedure itself consists in the fact that you collect tap water and boil it for at least 1 hour, after cooling it and pouring it into the aquarium, while ensuring that the sediment formed at the bottom does not fall into the reservoir.

Once I tried this method, put three “jans” on gas and started boiling! Half an hour later the kitchen turned into a sauna – evaporation was capital! However, the reserved water was extracted.

Why am I this – and the fact that you will not be troubled with boiling. If you have a huge aquarium, imagine how much you need to boil that water, even for a substitute. In addition, when boiling die, not only harmful bacteria, but also useful “flora.”

Therefore, I tend more and recommend freezing water.

Melt aquarium water
Actually, we take plastic 5-10 liter beaches from under mineral water, pour tap water into them and put in the freezer for a day. After a day we reach, defrost and add to the aquarium without sediment.

Tip: Do not fill the beaches until it stops; remember, the water expands when frozen.

In my opinion – this is the best way to prepare and soften aquarium water. Everyone knows that melt water is useful not only for fish, but also for people, it retains all its beneficial properties and does not contain harmful substances.

This is the difference between thawed and distilled water.

Distilled Aquarium Water
You can buy in a container, and you can take from a reverse osmosis filter. Such water is also suitable for an aquarium, especially if you need to soften the water. The only negative – it is “dead”!

So, the choice is yours!

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