foam after changing the filter cotton. Filter cotton itself can provide attachment for nitrifying bacteria. Once replaced, the original ecological cycle in the tank will be broken, and the nitrification system will take some time to recover. At this time, if the previous feeding situation is maintained, ammonia nitrogen will escape because it can not be converted, so there will be a lot of foam, and the solution is to reduce feeding.
1, fish density: fish tank has foam, the primary reason is that the feeding density is too large. Fish farming must control the number, if too much, fish excretion increases, oxygen content decreases, water quality can not be maintained, but also become more and more fat, which will produce a large number of bubble rice, but also may accelerate the reproduction of microorganisms.
2. Feeding too much: If you feed too much fish at ordinary times, there will be a lot of residual bait in the water, which will also cause eutrophication of the water body. In view of this situation, it is necessary to reduce the amount of food fed, although two to three times a day, but do not feed too much each time, feeding too much is also prone to enteritis and other diseases.
3. High temperature: When the water temperature rises, there will be a lot of foam in the fish tank. This is because the dissolved oxygen in the water body will change with the change of temperature, and the higher water temperature will lead to the decrease of dissolved oxygen, thus producing foam.
