Phosphate is an end product from the degradation of organic substances such as uneaten food and fish waste, etc. and can cause algae growth. Although the phosphate value should be as low as possible, values up to 0.5 mg/l are tolerated. Attention! Phosphate tends to form insoluble salts which will be precipitate on the bottom with the silt. It is recommended to regularly remove the sludge from the bottom.

Keep out of reach of children.