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Do-it-yourself co2 generator for aquarium

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CO2 for aquarium do it yourself

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

From school, anyone knows that carbon dioxide, the basis of photosynthesis, is absorbed by plants from the surrounding air. Due 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 tank. Creating a concentration of carbon dioxide ranging from 3 to 7 milligrams per liter of aqua is a necessary condition for aquarium plants to feel normal. To do this, it is not necessary to acquire industrial carbon dioxide systems.

Drinking sparkling water as a source of carbon dioxide

It is so elementary that many aquarists do not even consider this method of introducing CO2 into aqua. And it is absolutely in vain, by the way.

The usual 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 to bring in aquarium water just 20 milliliters of soda per 10 liters of water, then for the aquatic flora this will be enough.

The simplest way to supply carbon dioxide

The main element is a vessel (a two-liter plastic bottle, for example) with ordinary brew. Fermented raw materials are poured into the bottle:

  • sugar - 300 g;
  • yeast - 0.3 g

The raw material is filled with 1 liter of water, sugar is not stirred. A tube (hose) is inserted into the bottle cap at one end, and the other end of the tube is lowered into the aquarium water. With the start of the fermentation process, the released carbon dioxide is discharged to the aqua.

To prevent clot mixtures from entering the aquarium, a small plastic bottle can be tied to the main tank and 2 more tubes can be attached so that the gas and fermentation products first fall into the small tank and then into the aquarium.

This method has significant drawbacks:

  • the inability to adjust the amount of carbon dioxide supplied to the aquarium water and the instability of its supply;
  • the short duration of such a system is up to 2 weeks.

Do-it-yourself CO2 generator

For the manufacture of a working gas generator with adjustable flow will require a little more materials and labor.

The principle of the installation is the gradual supply of citric acid from one vessel to another, where there is baking soda. The acid is mixed with soda, and the CO2 released as a result of a chemical reaction enters the aquarium tank. Consider the manufacturing process of the stages of work.

Creation of the device

Take two identical liter plastic bottles. In the caps, you must carefully drill a hole through the tree through 2 holes for the subsequent installation of tubes (hoses). One tube with a check valve connects tank No. 1 with tank No. 2.

A tee tube is inserted into the second openings of the caps, one branch of which also has a check valve. Hoses with non-return valves should be inserted into tank No. 2, and a small tap for flow control is installed on the central branch of the tee.

Required reagents

A bottle of soda water is poured into bottle No. 1 (60 g of soda per 100 g of water), and bottle No. 2 is filled with citric acid solution (50 g of acid per 100 g of water). Lids with tubes should be tightly screwed onto the bottle.

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

Beginning of work

To start the process of generating gas, you need to press on the bottle number 2 (with citric acid). Acid through the first hose enters the soda solution, and the reaction occurs with the release of carbon dioxide. Nozzle check valve prevents soda solution under pressure from entering tank No. 2.

The released gas passes in two directions:

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

By means of the faucet it is possible to regulate the gas flow. If instead of a self-made tee to use hoses from a medical dropper, then an additional counter of gas bubbles will appear, which is very convenient for creating an accurate concentration of CO2 in aquarium water.

Alternative installations

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

The nutrition of aquatic flora with carbon dioxide is the key to their normal growth and life. To ensure this process at home, a minimum of available material is enough, a bit of perseverance and very little financial expenses.

Related video: creating a CO2 reactor for the aquarium with your own hands.

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

CO2 - what is it?

Sooner or later, every serious aquarist is faced with the issue of supplying CO2 to an aquarium. And not without reason. Why does he need aquarium plants? 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 pond in which they grow. Since the volume of water in natural water bodies is very large, its concentration in them is usually constant. But about the aquariums can not be said.

The plants quickly use 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 compensate for the lack of CO2, as they exhale so small of its share 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 its content is low, has an increased hardness (pH), which is detrimental to them. Even inexperienced aquarists have probably noticed that after adding plants, tap water becomes tougher than it was in an empty aquarium. This is due to the fact that carbon dioxide contributes to the appearance of carbonic acid in water, and it lowers the rigidity. That is, it is important to understand: the less CO2 in water, the higher its pH.

co2 for aquarium

Soda as a source of CO2 for the aquarium

For nano aquariums up to 20 liters, not everyone wants to contact the balloon CO2 installation. You can make a CO2 generator in Braga or soda. But you can do it easier. There is an ancient and undeservedly forgotten method of supplying CO2 — this is the use of soda water. Sparkling water is a kind of carbon dioxide concentrate already dissolved in water.

The CO2 content in the soda is usually about 5000-10000 mg / l, and after opening the bottle it tends to 1450 mg / l. If you count how much carbonated water is needed to bring the CO2 concentration in the aquarium to 10 mg / l, it turns out to be quite economical. Fresh soda needs only 20 ml per 10 l of aquarium water, which will give 10 mg / l CO2 in the aquarium. Simply in the morning to soda with fertilizers. After standing, soda can be added in large quantities, as carbon dioxide disappears.

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

First, it is not known how much carbon dioxide your soda contains is 5000 mg / l or 10000 mg / l. Secondly, large fluctuations in the concentration of CO2 in the aquarium are not desirable. After adding soda, the concentration will gradually decrease due to the consumption of 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 an aquarium.

Advantages of the method:

  • there is no need for a CO2 dissolution reactor and a bubble counter, since CO2 is already dissolved in sparkling water;
  • ease of use;
  • economical in the short term;
  • suitable for nano aquariums.

Cons method:

  • 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 run and for large-scale aquariums;
  • low CO2 supply compared to other methods.

    Some practical tips:

    For most plants, including rare and difficult, only a small CO2 feeding is sufficient; better underfeed than overfeed. Try to keep the indicator in the green zone.

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

    co2 for aquarium

  • If there is nothing wrong with the fish, you don’t 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 go off scale in my aquariums, but not a single death of fish - for CO2 poisoning was not.

    When optimal saturation conditions are found, it makes no sense to cut off the carbon dioxide supply for the night, a small morning excess of CO2 will be selected by plants in the evening, this mode repeats daily variations in the gas composition and Ph in natural water bodies and has a beneficial effect on the growth of all plants.

    IMPORTANT: when using external filters or filters of other models as a reactor, do not in any case supply CO2 to the filter elements. CO2 should be supplied only AFTER all fillers, otherwise the microflora inhabiting the filter materials may die.

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

    If you are forgetful, I do not advise to use the clamping wheel on the dropper tube as well. If you close it for a long time during fermentation, the increased pressure inside can break the bottle.

    Do not put the bottle on the warm lamp of the aquarium - fermentation will go too intensively and will end in a short time.

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

  • Controls for the carbon dioxide content in the aquarium.

    To control the supply of CO2 in an aquarium, there is actually one way to measure acidity (PH) and carbonate hardness (CN), followed by determining the concentration of CO2 in water using the table Table carbon dioxide content in an aquarium (CO2, CO2). It is somewhat more convenient to do this procedure with the calculator calculator.php # j One feature is in our calculator, when entering the PH value, you need to use a decimal point as a decimal place.

    co2 for aquarium

  • Based on the same principle, the use of drop checker (QH). DF is a container, in one part of which the reference indicator solution is filled with water from KN 4, to which an indicator has been added, an analogue of the PH test. The second part of the tank is open and aquarium water flows into it. Both parts of the tank are designed in such a way that there is always an air cushion between the indicator solution and the aquarium water. A kind of "siphon vice versa."
  • When the concentration of CO2 in the aquarium water increases, a part of it goes out of it into an air cushion, leveling the partial pressure of CO2 in the water and the air above it. At the same time, CO2 is dissolved 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 responds by changing color. By its color and can be judged on the concentration of CO2. When reducing the concentration of CO2 in water, everything happens in reverse order. This is a permanent test for PH Drop Checker with your own hands (DIY CO2 Drop Checker).
  • A very convenient device with one significant drawback, until all the above processes are completed, it takes 2-3 hours, the time delay of the QH. During this time, you can put all the fish. Therefore, I would recommend using tests and a calculator at the stage of gas supply development in order to have "instant" values, and use the QH for general control in the already established mode.
    Bubble counter.
    To track the amount of CO2 entering the aquarium, a bubble counter is used - a small transparent tank filled with water and embedded into 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 to the left, seventh photo to the right). Again, I don’t understand why to pay, when you could just as well take a drip filter for this purpose))).
  • It is advisable to put a check valve under the bubble counter, so that in the event of a gas pressure drop, the water does not flow down the tube. The check valve should also be placed in front of a rowan branch or a diffuser in the aquarium. Non-return valve in the carbon dioxide supply system for the aquarium
    -Pearling- bubble plants. A somewhat subjective method of controlling the CO2 content in an aquarium.
  • However, the fact remains that an experienced aquarist, knowing the chemical composition of the water in his aquarium and his own lighting, may well make a fairly accurate conclusion about the concentration of CO2 in the water. Moreover, different plants react to it differently.

The simplest way to supply carbon dioxide

The main element is a vessel (a two-liter plastic bottle, for example) with ordinary brew. Fermented raw materials are poured into the bottle:

  • sugar - 300 g;
  • yeast - 0.3 g

The raw material is filled with 1 liter of water, sugar is not stirred. A tube (hose) is inserted into the bottle cap at one end, and the other end of the tube is lowered into the aquarium water. With the start of the fermentation process, the released carbon dioxide is discharged to the aqua.

To prevent clot mixtures from entering the aquarium, a small plastic bottle can be tied to the main tank and 2 more tubes can be attached so that the gas and fermentation products first fall into the small tank and then into the aquarium.

This method has significant drawbacks:

  • the inability to adjust the amount of carbon dioxide supplied to the aquarium water and the instability of its supply;
  • the short duration of such a system is up to 2 weeks.

Do-it-yourself CO2 generator

For the manufacture of a working gas generator with adjustable flow will require a little more materials and labor.

The principle of the installation is the gradual supply of citric acid from one vessel to another, where there is baking soda. The acid is mixed with soda, and the CO2 released as a result of a chemical reaction enters the aquarium tank. Consider the manufacturing process of the stages of work.

co2 for aquarium

Creation of the device

Take two identical liter plastic bottles. In the caps, you must carefully drill a hole through the tree through 2 holes for the subsequent installation of tubes (hoses). One tube with a check valve connects tank No. 1 with tank No. 2.

A tee tube is inserted into the second openings of the caps, one branch of which also has a check valve. Hoses with non-return valves should be inserted into tank No. 2, and a small tap for flow control is installed on the central branch of the tee.

Required reagents

A bottle of soda water is poured into bottle No. 1 (60 g of soda per 100 g of water), and bottle No. 2 is filled with citric acid solution (50 g of acid per 100 g of water). Lids with tubes should be tightly screwed onto the bottle.

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

Beginning of work

To start the process of generating gas, you need to press on the bottle number 2 (with citric acid). Acid through the first hose enters the soda solution, and the reaction occurs with the release of carbon dioxide. Nozzle check valve prevents soda solution under pressure from entering tank No. 2.

The released gas passes in two directions:

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

By means of the faucet it is possible to regulate the gas flow. If instead of a self-made tee to use hoses from a medical dropper, then an additional counter of gas bubbles will appear, which is very convenient for creating an accurate concentration of CO2 in aquarium water.

Some owners of ornamental fish using an adapter attach the exhaust hose to the outlet of the internal filter. In this case, carbon dioxide diffuses, and it is better absorbed by plants.VIDEODo I need CO2 in the aquarium? What conditions should be in the aquarium, what would the carbon dioxide plants need?
What is an overclocked aquarium?
Find out what is the main reason why CO2 should be brought into the aquarium.
What are the options for introducing CO2 into the aquarium?
Do I need a brew on the volume of the aquarium of 200-300 liters?
What are the disadvantages of using mash in an aquarium?
Why do I need to turn on the compressor at night in the aquarium, when using mash?
Can a CO2 cylinder explode? How often do they explode?
What is the average, normal temperature for plants?
See the installation process for the CO2 system from Dennerle.

CLEANING AQUARIUM FOR BEGINNERS.

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HEATER FOR AQUARIUM AND EVERYTHING YOU NEED TO KNOW ABOUT IT.

How to make most CO2 system for aquarium races

DIY CO2 Reactor.

System supply of CO-2 to the aquarium do it yourself

CO2 Carbon Dioxide Generator on Citric Acid and Soda. How it works.

CO2 Carbon Dioxide Generator on Citric Acid and Soda. How it works.

CO2 with your hands

Carbon dioxide in the aquarium (soda + citric acid) # 1

Aquarium Co2 diffuser and bubble counter 2 in 1 with your own hands for 5 minutes.

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