How to purify the water in fish ponds

The water quality treatment (or purification and filtration) of fish ponds includes physical filtration and biological purification.

Physical filtration is mainly to remove solid waste and floating dust visible to the naked eye in water;

Biological purification is mainly to purify colorless harmful substances dissolved in water-ammonia and nitrite, and decompose food residues, fish manure and so on.

The best way to realize the above water quality treatment is to combine physical filtration with chemical purification to treat the water inside the fish pond. To make it clear, there are few harmful substances, suitable temperature, moderate pH and hardness, high dissolved oxygen content and moderate moisture beneficial to microorganisms.