Having a nutrient content that is too high – especially the phosphate content – is one of the biggest problems for water as it leads to excessive algae growth. SeDox converts phosphate as the most important nutrient for algae in water into the insoluble mineral apatite, which is harmless to fish and other living organisms. The benefit of this is that algae can no longer use phosphate as a nutrient. Depending on the amount of phosphate, SeDox is effective for up to six weeks. During this time, it reduces the phosphate content of the water to less than 0.035 mg/l – the key parameter for excessive algae growth. SeDox also promotes the decomposition of organic sludge.