1. Has the aquarium been supplying oxygen? There are advantages and disadvantages to pumping oxygen all the time. On the one hand, sufficient oxygen can really make fish breathe more smoothly, and there will be no hypoxia, which will also help some aerobic bacteria to breed and maintain water quality. On the other hand, fish living in high dissolved oxygen environment for a long time, once put into water with slightly lower dissolved oxygen, will immediately produce stress reaction and even lead to their death.
Second, when to oxygenate the fish tank 1, daily oxygenation: If the number of fish raised is huge, the breeding density is relatively high, or they are all big fish, and the demand for oxygen is large, they should be oxygenated in peacetime. However, it is enough to control the oxygenation time at 2-4 hours a day. Oxygen can be increased for 4-6 hours in summer and rainy weather. If there are aquatic plants, you need to increase oxygen 1 hour at night.
2. Raising oxygen: When the fish tank is opened, it needs to be raised. The bacteria here are nitrifying bacteria and aerobic bacteria, and increasing oxygen is helpful to its growth and reproduction. Therefore, after injecting nitrifying bacteria, it is often necessary to continue aeration for 24-48 hours in order to better establish a nitrification system.
3, oxygen during illness: If the fish is sick, it needs to be properly oxygenated. Adequate oxygen is very helpful for its recovery. Moreover, some drugs will affect the oxygen content after being put into water, and oxygen can also play a role in supplementing dissolved oxygen.