The dropping of food The food from the rest of the fish. The excreta of fish And a rotten thing to ferment the filth caused by deposition for several months, causing ammonia gas. This is dangerous to water
Dropped its food, the food leftovers from eating fish, as well as the tissues of fish. And the spoilage of things is fermented refuse caused accumulation for several months to remedy ammonia gas, which is harmful to water .