Do not change the amount of water in the pool more than 1/3 of the total amount of water.
Changing the water should pay attention to the bottom of the sewage and the surface of the oil film;
Do not change the water within two days after fertilization and medication. Do not change the water after the aerator is turned on to avoid wastage;
The diseased pond water body must not be arbitrarily discharged without being disinfected;
When changing the water, the temperature of the new water added should be consistent with the temperature of the pond water.
When changing the water, the amount of plankton in the pond water should be taken into account. The plankton biomass after water exchange should be kept as much as possible before changing the water.
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