The aeration pump for fish culture runs for 2-4 hours a day. Usually, it is not necessary to keep the aeration pump on all the time, because fish are adapted to the environment with high dissolved oxygen, once the oxygen content decreases, it will affect their health and even lead to their death. However, in the high temperature season, or in continuous rainy weather, the opening time of the oxygen pump should be extended appropriately, and it needs to be opened for two more hours. If there are water plants in the tank, it will be open for an hour in the evening.
1. Floating head: Most fish will have the performance of floating head when they are hypoxic. No matter the fish live in the upper or lower layer, they will go to the surface to breathe. It should be noted that if there are many fish, but only one floating head, it shows that the water is not anoxic, but the gills of this fish have problems, which need timely inspection and treatment.
2. Tank jumping: There are many reasons for fish tank jumping, and hypoxia is one of them. Of course, it is not lack of oxygen will jump cylinder, want to jump cylinder, water depth is also a certain requirement, if too little water, even if lack of oxygen it can not jump out.
3. Anorexia: Fish farming basically needs to be fed every day, two to three times a day, and it needs to be timed and quantified. Generally, when the time comes, the fish will be very active and will grab food after feeding. If they are all very anorexic, it shows that the dissolved oxygen in the water body is relatively low.
