In fact, the treatment of nitrogenous waste in fish tanks is very important, and how to effectively reduce ammonia nitrogen and nitrite in water will be a The key to the success of farming. So today, follow your pet editor to learn about the nitrifying circulating aquaculture system!

1. Necessary for the reproduction of nitrifying bacteria

1. High oxygen content

The nitrification and nitrification of nitrifying bacteria require a lot of oxygen; increasing the dissolved oxygen in the water can not only make the fish live healthier, but also provide sufficient energy for the nitrifying bacteria to decompose toxins in the water. At the same time, we know that once the water body is in an oxygen-deficient state, nitrate will be reduced by reducing bacteria to toxic nitrite and ammonia, and another toxic substance-hydrogen sulfide will be produced. The consequences are quite dire.

2. Attachments

The growth and reproduction of nitrifying bacteria need attachments. Compared with fish ponds, the advantage of an aquarium is that it can be equipped with a powerful filtration system, which is a good place to cultivate nitrifying bacteria. Therefore, in the aquarium, we often use biochemical cotton, biochemical balls, ceramic rings and other materials with good adhesion and porousness to maximize the water filtration area and allow more nitrifying bacteria to live.

3. Slow reproduction

Nitrifying bacteria reproduce very slowly, and it takes about 10-20 hours to reproduce one generation. The heterotrophic bacteria that decompose organic matter into ammonia can reproduce in a few minutes or tens of minutes, and its nitrosation and nitrification are far behind the speed of the ammoniation reaction, resulting in a sharp increase in ammonia concentration, ammonia poisoning, and ammonia. The hypoxia caused by the consumption of a large amount of oxygen during the chemical process is the most likely to lead to the death of fish.

4. Artificial addition

We need to let the nitrifying bacteria multiply until they can decompose the ammonia and nitrous acid continuously produced in the water in time. ’, in the case of natural reproduction, this process takes about 4-6?L. Therefore, if we want to quickly establish a nitrification system, it is necessary to manually add a certain dose of nitrifying bacteria when opening the tank.

2. Forms of nitrifying bacteria preparations

1. Liquid (live bacteria)

Liquid bacteria are all airtight packaging, in this low oxygen or even anaerobic condition Under the conditions, nitrifying bacteria can only survive for a short time and die soon. The advantage of liquid bacteria is that it is viable, and it can work quickly after entering the water, and the water quality can be significantly improved in a short period of time; the disadvantage is that it cannot be stored for a long time.

2. Dry powder (dormant bacteria)

Under dry conditions, nitrifying bacteria will enter dormancy, and the survival period can be as long as 2 years. This dry powder is easy to store and transport. It is a popular nitrifying bacteria agent in recent years. The disadvantage is that because it is in a dormant state, the nitrifying bacteria will not work immediately after entering the water. , gradually play a role, so it is not applicable to the water body that needs to be improved immediately for the sharp deterioration of water quality.

3. What is the difference between nitrifying bacteria and photosynthetic bacteria?

1. Bacterial color

No matter what kind of photosynthetic bacteria, usually because of the photosynthetic pigment, Such as bacteriochlorophyll (green), carotenoid (orange yellow), etc., and show a certain color. Because nitrifying bacteria do not contain any photosynthetic pigments, there will be no color phenomenon, so this feature can be used to make a preliminary judgment.

2. Smell of bacteria liquid

Once the product of photosynthetic bacteria is opened, you can smell a foul odor immediately, while nitrifying bacteria have no obvious odor.