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How to prepare water for an aquarium

maintenance, care, compatibility

How to prepare water for the aquarium at home

Freshly tap water is not suitable for animal settlement. Reptiles, fish, amphibians and snails can adapt to it, but on condition that it infuses for several days. Fresh, domestic water from the tap will destroy animals, because chlorine compounds are toxic to the sensitive organism of small creatures.

On certain days, tap water contains different amounts of volatile substances, experts recommend turning on a shower and checking the steam and the presence of chlorine to check. If the smell is harsh, water should not be collected on this day.

Regardless of the season, weather and air temperature, domestic water will be different. Be observant if you want to settle the animals in clean water from impurities. Infused tap water is recommended for many pets and plants, it has an acceptable level of acidity: pH 7.0.

It forms an active reaction, creating an alkaline and acidic aqueous medium. The reaction is determined using litmus paper, which is sold in pet stores. Infusing water should not be in plastic containers; it is better to use glass jars with the lid open.

The main thing is that in the prepared water, while it insists, do not get dust and insects.

See how to test the water.

You can use baking soda to raise the pH to the required level. Peat is recommended to lower the pH.

Sometimes before the launch of a new aquarium in the water put samples of trees, reducing the acidity of water. The aquarium can be filled not only with tap water, but also distilled water, which is sold in pharmacies or in auto shops. It is filled with small aquariums, but with an experienced razvodchiki warned that such water is poor in the mineral components necessary for animals.

Rarely use a liquid from another aquarium, in which there is a stable biological equilibrium for normal life.


As you know, all the fish and not only breed at a certain temperature of the aquatic environment. Heat mimics the rainy season, climate change, and the time of year, serves as a signal for finding a pair and spawning. All types of fish, snails, amphibians and reptiles live in different water temperatures.

Also, residents of home nurseries are divided into two types – cold-loving and heat-loving. Heat-loving – those who live at a temperature not lower than 18-20 degrees Celsius, while cold-loving people are able to live in cool water (14-18 degrees and lower). The latter live only in spacious reservoirs, where there is a slow and cool undercurrent.

Heat-loving species in cold water behave sluggishly, motionless, begin to ache.


Starting the preparation of water for the aquarium, consult with experts, or ask for help from the specialist literature. For each pet requires optimal water temperature, so only compatible animals need to settle in one tank with identical parameters (heat-loving people are not settled with cold-loving, herbivores and predators are kept in separate nurseries, large and small are settled separately).

In accordance with all parameters (permissible threshold of temperature, acidity, hardness), the acquired living creatures inhabit the aquarium. You should also take into account the conditions of the content of plants in the water, they are important specified parameters of the aquatic environment.

Comfortable neighborhood will provide proper care and living conditions.

See how to prepare water for an aquarium.

The health status of its inhabitants directly depends on what kind of water is used for an aquarium. Water has a huge number of different properties.

Therefore, aquarists, before preparing the water, it is necessary to learn to identify them, as well as to control and properly regulate them so that the inhabitants of the home water body can comfortably stay in it.

Normal tap water for aquarium is not suitable. It needs to be prepared.

Thus, the preparation of water begins with a banal sedimentation. To begin with, it is necessary to pour water into any container with the help of a shower. In this case, the shower will help get rid of a certain amount of harmful substances that are contained in tap water, and may not have the best effect on the health of the fish.

Using a shower also makes it possible to understand whether it is worthwhile to use tap water on a certain day to fill the aquarium, or it is better to postpone this event to another time. The fact is that with the use of the shower, it is possible to determine whether the chlorine content in the water is exceeded on any given day.

It is no secret that every day in tap water contains a completely different amount of impurities. As a rule, it depends on the season, weather conditions, etc. If you feel a strong smell of chlorine, then this water for the aquarium is better not to use or use after treatment with special dechlorinating agents.

AQUAYER AntiToxin Vita makes water safe for fish by eliminating chlorine even in high concentrations.

The use of tap water to fill the aquarium is also due to the fact that it has the acidity necessary for the normal development of fish and plants (PH = 7). This is an active reaction characterizing the alkaline and acidic environment of water.

This reaction is determined using paper indicators that can be purchased at any pet store.
If the PH level is lowered, you can use regular soda to increase it. To lower the PH used peat, not collected on a hill.

Distilled water can be used to fill the aquarium. You can buy it in an ordinary pharmacy. However, this method of filling the aquarium is suitable only if the aquarium is small.

Many experts still do not recommend the use of distilled water, because it lacks minerals that are useful for the abodes of the aquarium.

There is also an option to use water from another aquarium (if there is one), in which biological balance has already been established for the favorable living of the fish.

Water temperature for the aquarium plays a crucial role. It depends on the health and ability of fish to breed. For each species of fish, a completely different water temperature is suitable.

Conventionally, all the inhabitants of the aquarium can be divided into heat-loving and cold-loving.

By heat-loving include fish living in the water, the temperature of which is not below 18 degrees. Cold fishes are individuals that easily adapt to low temperatures. They can safely live in the aquarium, the temperature in which, will not exceed 14 degrees.

The maintenance of cold-loving fish is possible only in large and spacious aquariums.

It is noteworthy that if the heat-loving fish are planted in cold water, then they practically stop swimming. This suggests that significant damage has been done to their health.

Preparing water for the aquarium, you should use the tips for beginners, which can be found in the special literature. So, it is possible to choose the optimum temperature for water only after it becomes known exactly which species of fish will live in it. The thing is that in the literature for each type of fish is given the permissible threshold of the highest and lowest temperatures at which the fish will feel comfortable.

In accordance with these parameters, you can choose the future inhabitants of the aquarium so that they all feel comfortable in the same temperature conditions. This will avoid a huge number of problems associated with the maintenance and care of the fish.

Aquarium water that has a certain temperature can stimulate spawning. This applies to elevated water temperatures.

However, this is not always useful for fish. So, the fish that spawn, you should not constantly keep in such conditions. Otherwise, to get offspring from them in the future will be simply impossible.

Thus, when harvesting water for an aquarium, it is better to ensure that it is one degree below the norm.

How to make the water prepared for the aquarium was not too hard?

When preparing the water for the aquarium, you need to ensure that it is not too hard. There are various ways to reduce stiffness.

So, before you prepare the water, it can be filtered, and only then can it be defended. Defend water for about two days. Also, the settled tap water can be mixed with distilled before adding to the aquarium.

Sometimes it is recommended to add thawed or rainwater to the aquarium.

Stiffness can be reduced with the help of plants. For example, this effect has a rodent leaf and elagia.
Reduce stiffness can be using the procedure of freezing. So, preparing the water for the aquarium, you first need to freeze it, and then thawed and settled can be poured into the tank.

Make water softer can be using ordinary boiling. For an aquarium, water is boiled only in an enamel pot.

After boiling, you need to pour out the top layer of water (1/3).

Some aquarists are interested in the question of how to prepare the water, which, on the contrary, is too soft. In this case, water can be mixed with tougher. In this case, suitable ordinary water from the tap.

You can also add a few pieces of chalk or limestone to the aquarium. If rapans are added to the aquarium, the rigidity will also increase. You can also use coral chips for this purpose.

However, it must be boiled beforehand (the cooking time is at least 2 hours).

After the water has passed all the stages of preparation, it can be poured into the aquarium. However, the fish can run into it only the next day.

The temperature of the water in the aquarium and the vessel in which the fish stayed, should be the same.

Preparation of water for the aquarium is an important step in creating comfortable conditions for the life and reproduction of fish. Therefore, to neglect this stage is not worth it.

Otherwise, the fish simply will not take root and will die in the first few days after settling in the aquarium.

The easiest and cheapest way to stock up on water is to use tap water in the tank. It is available to almost everyone, suitable for any freshwater aquarium. For fish, it is not harmful if it is properly defended.

If a quality water purifier from the tap is not installed in your home, you should not immediately pour the liquid that you have collected into the tank. Compounds of chlorine that are in the water need to be weathered for several days. Why do this?

To protect the fish and plants from poisoning and premature death.

You can dial the water in glass jars directly from the tap, and leave it for 3-4 days, covered with gauze. All volatile compounds will evaporate and the liquid will become colorless and free from chemical compounds. It is necessary to check the collected water for smell and color.

Chlorinated water smells sharp, has a milky white color.

See how to carefully pour the distilled water into the aquarium.

Water from their other aquarium can be useful – it has a long-established microflora and biological balance. For fish it is a reliable source of trace elements that are beneficial in terms of recovery. However, without knowing the history of another aquarium, it would be correct to find out what freshwater fish lived in it, what it was sick with, and what quality its water was.

You can ask this question from the owners of the reservoir, or conduct observations on their own. For the experiment you need only a few days, some free time, and, of course, old water.


Pour the liquid into a clean glass tank, let it stand in it for several days. Noticing cloudiness, precipitation – you know, it is not entirely safe. It is possible to pour a part of such water into an unprepared aquarium with plants.

If their appearance has deteriorated – a sure sign that the fish should not live in a pond with such water. But the best way is to start a tank with new water on your own, or to seek help from trusted distributors.

Marine aquariums in our country have not yet received such wide distribution as freshwater. Perhaps this is due to the problem of the availability of natural sea water, especially if there is no sea nearby.

However, no matter how strange it may seem at first glance, the presence or absence of a natural saline environment does not affect the launch of the marine (or reef) aquarium. Such water can and should be prepared independently, and the technology of preparation has long been tested in practice.

The basic principle of creating “sea” water for the aquarium

Only after cleaning the primary material, you can start salting.

If the aquarium is small, it is better to prepare the marine aquatic environment in a separate container and then pour it into the jar.

What capacity categorically can not be used? Experts give an exact answer to this question:

  • metal, galvanized, enameled pots, pans, buckets;
  • plastic containers not adapted for food;
  • cans, cans and other containers where chemically active and poisonous substances (fuel and lubricants, solvents, paints, varnishes, etc.) were once contained.

But the plastic canister (or bottle), which was originally drinking water, is fine.

The process of adding and dissolving salt is very simple, it is described in detail on the label of a commercial product. Moreover, it is possible to pour out the full weight of salted powder on 1/3 of the required volume, and then add osmotic water, bringing the volume to the norm.

And you can gradually fill the salt in the full volume of fresh osmotic water. By the way, if the aquarium is large, then it usually does.

However, right after salting the sea water is not ready yet. It is necessary to wait until the constituent elements of the salt fully enter into interaction with each other and with the aqueous medium.

As a rule, it takes no more than 24 hours. And only then you can turn on the aquarium equipment, run the aquarium.

For the first 2-3 weeks, it is advisable to monitor the water parameters daily: salinity – using a hydrometer, and hardness – using special tests to measure the total hardness.

Proper preparation of sea water is a very serious and rather time-consuming process, on which the successful functioning of a saltwater or reef aquarium depends. And if the aquarium inhabitants of the marine aquarium feel good, then the synthetic sea water is done correctly.

An example of how to properly prepare sea water for an aquarium, look at the video:

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