Yellow powder can't soak fish all the time. Yellow powder is a medicine. As the saying goes, medicine is three-point toxic, which is also true for fish. Soaking yellow powder for a long time is not helpful to the health of fish. On the contrary, it will destroy the ecosystem in the tank because of its sterilization ability, resulting in the death of beneficial bacteria such as nitrifying bacteria, thus affecting the maintenance of water quality and the survival of fish. Therefore, yellow powder is needed only when fish are sick.

1. Avoid light: Yellow powder needs to avoid light because it will decompose under light, thus affecting its medicinal properties. Pay attention when keeping it at ordinary times. It is best to put it in a dark place, and also when taking medicine. It is necessary to turn off the lights for a period of time after taking medicine. If it is daytime, it is best to cover the fish tank with cloth.

2. Temperature control: If you want to give full play to the effect of yellow powder, you'd better control the water temperature. The water temperature should be maintained above 20 ℃, so that the drug effect can be exerted normally. In addition to temperature control, we should also pay attention to changing water, usually every other day, so as to avoid the harm of drugs in water for a long time to other beneficial bacteria.

3. Oxygen explosion: After using yellow powder, oxygen explosion will take a period of time. The reason for oxygen explosion is very simple. After the medicine enters the fish tank, it will digest oxygen, and the oxygen consumption of fish will increase during treatment. If the oxygen is insufficient, the treatment will even be discounted, so it is necessary to continuously oxygenate the water with an oxygen pump.