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Oxidator in the aquarium: what it is and how it works, do it yourself

Some owners of aquariums instead of a compressor for aeration began to put an oxidizer. Consider this device, function, principle of operation and how to do it yourself.

The oxidizer is a device that receives oxygen from hydrogen peroxide and supplies it to the aquarium. They can replace the compressor for aeration, which also fills the aquatic environment with this useful gas. This is especially true for aquariums with a small surface or too thick vegetation.

At night, overgrown algae actively absorb oxygen, and fish may suffocate. Did you know? Snails are a good natural indicator that indicates whether there is enough oxygen in an aquarium.

With an oxygen deficiency, they are on aquatic plants or on the walls. If this gas is enough, then the snails can be on stones or other decorations.

The oxidizer consists of the following parts: glass container; plastic cover with holes; catalysts; base.

Now on sale you can find oxidizers for the transport of fish, for aquariums of various volumes, and even for ponds.

The basis of the oxidizer is the catalytic decomposition of hydrogen peroxide, which is controlled by the ambient temperature. The higher the temperature of the water in the aquarium in which the oxidizer is installed, the faster the peroxide decomposes and more oxygen is obtained, while the pure, not yet decomposed peroxide remains inside.
Why is the use of pure peroxide without an oxidizer dangerous?
First of all, it should be noted that peroxide is twice as heavy as water and therefore immediately sinks to the bottom. If you directly pour a solution or throw a dry peroxide tablet into water, it will not immediately decompose into its constituents, but will burn, oxidize and poison the bottom layers close to it, the roots of the plants and kill the beneficial bacteria.
Secondly, the acidity of water immediately decreases sharply, the reservoir will sour, all living organisms will die. Therefore, the process of decomposition of peroxide into pure oxygen and water should go slowly and under control.
The secret of the oxidizer is simple – the catalyst is a specific composition of ceramics, which completely, slowly and meteredly, decomposes hydrogen peroxide into water (H2O) and active oxygen (O *).
H2O2 – ceramic catalyst – H2O + O *

Oxidizer – self-regulating device

How does pure oxygen release over a long period of time? The answer can be given by looking at the tiny ceramic part in the oxidizer container.

This detail is a small catalyst that liberates oxygen. The resulting gas creates excessive pressure, due to which the solution is squeezed out drop by drop through a small hole in the cork of the flask-container.

The amount of solution flowing out of the container does not depend on the size of the hole, but on the speed of the catalyst. If the catalyst is too active, an excess solution will be supplied to the water, if it does not work at full power, the amount of solution will be insufficient.
The amount of oxygen supplied to water depends on:
• size and quantity of catalysts used;
• concentration of the solution used;
• water temperature.

For marine and large freshwater aquariums, larger ceramic catalysts are used, about 1 centimeter long. In order to increase the productivity of the oxidizer, it is possible to double the number of catalysts, which, accordingly, will double the oxygen yield.
The concentration of the solution used and the temperature of the water

Note the main characteristics that are worth paying attention to:

• When the temperature rises by 8 degrees, the oxygen output doubles, and when the temperature drops, it decreases fold.
• Doubling the concentration of the solution increases the dosage four times. This is due to the fact that from the container “squeezed out” twice the solution containing a double dose of oxygen.
• A total of 156 grams of pure oxygen will be released from a liter of 30% hydrogen peroxide solution. This amount is enough for a single full saturation of 20,000 liters of water.
• In warm water, the duration of the oxidizer is much less than in cold water.

The duration of the oxidizer depends on:

• water temperature;
• the capacity of the solution container (the larger it is, the longer the device will work, and vice versa);
• peroxide solution concentration (the higher it is, the less the device works, and vice versa);
• the number and size of the catalyst (increasing the number of catalysts reduces the duration of work, and vice versa)

Oxidizer – Algae Remedy

The presence of an oxidizer greatly increases the redox potential (redox potential) of water. This inhibits the development of algae, stops the conversion of relatively non-toxic nitrates (NO3) to toxic nitrites (NO2), oxidizes organic substances and decomposition products in water to carbon dioxide (CO2).

The more carbon dioxide dissolved in water, the lower the acidity (pH).
Carbon (C) is the most important food substance contained in water in the form of carbon dioxide, carbonic acid (H2CO3) and calcium bicarbonate [Ca (HCO3) 2].
It is important to remember that higher plants use CO2 that is more easily absorbed by carbon dioxide, and undesirable algae in water consume carbon from calcium bicarbonate (which contains, for example, hard water from wells and wells). Consequently, a large amount of carbon dioxide CO2 is useful for higher aquatic plants, and an excess of Ca (HCO3) 2 – for algae.
When creating a flow or good aeration, the concentration of carbon dioxide at a given temperature will tend to normal.

In this case, 1 l of water will contain only 0.5 mg of CO2; pH in this case with a carbonate hardness of 10 ° will be about 8.9. This indicator is unfavorable for most fish. This can also happen with the active growth of plants contained in bright light, and consuming large amounts of carbon dioxide.

Fluctuations in pH can be a source of great problems, especially in a pond. So, in the afternoon, as a result of assimilation (absorption of nutrients by plants), the amount of CO2 decreases, and at night it increases as a result of respiration of both animals and plants.

Thus, in the morning the pH value may be around 7.0, and in the evening – 10.0. It is important to understand that the acidity (pH) depends on the lighting, the development of algae and the way oxygen is supplied, and not on the properties of water.

Oxidant against choking fish

The oxidizer is most effective in clean aquarium water, in this case all the oxygen is completely used for the respiration of fish and the destruction of parasites. The higher the temperature of the water in the aquarium, the more often the fish breathe and the greater its need for oxygen. If you install an oxidizer that corresponds to the volume of the aquarium, it will allow you to contain more fish.

The presence of the oxidizer does not replace the compressor, but complements and insures its action in case of sudden interruptions in electricity or temperature fluctuations.
Especially useful oxidizer in aquariums with goldfish, as they grow to a fairly large size and have a great need for oxygen. It is advisable to install an oxidizer also when new fish are settled or when gill parasites are suspected in the aquarium.
In aquariums with problem fish (discus, skates, tanganyik cichlids, etc.) and in marine aquariums, it is better to install an oxidizer into the external filter system, which will ensure more uniform mixing of oxygen-enriched water. With signs of choking in fish, it is urgent to install an oxidizer and at the same time replace part of the water with fresh settling.

To eliminate asphyxiation in shipping containers or in packages, you can use FT or FTc oxidizers, while simultaneously replacing water and adding a liquid catalyst from a set of FT or FTc oxidizers.

From a liter of 30% solution of hydrogen peroxide a total of 156 grams of pure oxygen will be emitted. This amount is enough for a single full saturation of 20,000 liters of water.

At a temperature of 25 degrees and one large catalyst from a liter of hydrogen peroxide solution per day will be obtained: with a 30% solution – 5000 mg; at 6% – 270 mg and at 3% – 65 mg of oxygen.

Oxidizer for the treatment and prevention of infections

Infections prevented by active oxygen oxidizer:
• Ichthyophthiriosis (point disease)
• Virulosis
• Zaprolegnioz (fungal rot)
• Asphyxia (choking)
Oxygen-attenuated infections with an oxidizing agent:
• Skin and gill flukes
• Helminoses (internal flukes)
• Inflammation of the swim bladder
• Bacterial cataracts
• Aeromonosis (carp rubella)
• Ulcers on the integuments of the body of fish, injuries and lesions of the fins
• Bacterial fish incompatibility
• Oodinios

Hello. Well, that will reveal the secret for what I needed clay pots from under the aquarium plants … …
But for what, for the manufacture of the oxidizer at home.
With me inspired, before that, bought Sochting Mini Oxidizer in ZooTown.ru, tynts.

Further, having studied this device, I decided to make the same similar one out of available tools.
For starters, I got the tank I found in my inventory.

After that, I found a cork to seal it ….

The stopper turned out to be too big and for this I used a 5ml syringe so that the stopper was tightly closed and did not hang out.

Cork went tight, as it should be.

It remains the case for small things; in the internet, there were many tips to use the internal element from conventional batteries instead of catalysts, but this did not help me, as I did not try, I had to buy original catalysts in ZooTown.ru, tynts.
Next, it remains for the small, how to install it in the aquarium, found two ways, one such as in the photo …. (mount to the glass on the suction cup)

Or in another way, I decided first to try using a cork from a half-barrel, but after the hydrogen peroxide solution had finished in the tank, it would pop up like a float (it turns out that the gray ring (cork) in the oxidizer is used as a weighting agent or sinker and everything, more from there is no sense to him).

And it dawned on me, for this, pots from aquarium plants are well suited, I searched for them for a long time in the city, I even found them in the “MA” store, but the price surprised me a lot 50rub / piece, I’m in shock …
But still I found them at an adequate price and bought them … ..

So that the homemade oxidizer would hold well inside the pot, I chewed the edge of the syringe slightly with a pair of pliers. Look at the photo here:

Well, that’s all the oxidizer is ready to work in the aquarium.
See …

And instead of their solution of hydrogen peroxide, I use the usual pharmacy 3% hydrogen peroxide. Thank you for your attention ..

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