... etc farming pond 2 Famous brand with ensured quality Working PrincipleHigh-speed-working impellers splash the water into the air → these ... the saturated ammounia, CO2, methane, sulfureted hydrogen, etc. go out of the water → the water quality improved. FunctionShrimp, eel, fish ... quickly and healthly and can be avoided to die because of lack of enough disssolved oxygen in the water, meantime, can be ...