Two nitrifying bacteria cannot be added at the same time. Nitrifying bacteria are usually bought in culture solution, and there is little difference in composition between different brands of nitrifying bacteria. However, it should be noted that each kind has a dosage requirement. If two kinds are used at the same time, the dosage must be halved. Usually, it is not recommended to use two kinds of nitrifying bacteria at the same time, which can not improve its growth and reproduction speed, and the dosage is not well grasped.

1. Cleaning filter materials: If the easiest way to destroy nitrifying bacteria is to clean filter materials, whether it is filter cotton or bacteria house, a large number of nitrifying bacteria are attached to them, so once cleaned, the original nitrifying system will be destroyed, and the water in the fish tank will soon become turbid, so the filter materials should not be washed frequently, and it is best to clean them in batches.

2. Frequent water change: In addition to cleaning filter materials, frequent water change will also affect nitrifying bacteria, resulting in a large number of deaths. Moreover, if the water is changed too frequently, the fish will also be stimulated, resulting in some discomfort. Therefore, it is necessary to control the water change cycle in daily feeding, and change it once a week.

3. Ultraviolet lamp: In order to ensure the safety of fish, fish farming needs regular sterilization, and ultraviolet lamp is one of the sterilization means. It should be noted that sterilization will not only kill harmful bacteria, but also eliminate beneficial bacteria, so nitrifying bacteria will also die.