Excess nutrients, and in particular excess phosphate, provides algae with a food source, massively accelerating their growth. SeDox Speed is the ideal solution if a quick remedy is required. It binds phosphate and converts it permanently into mineral apatite in just a few hours. Apatite is safe for fish and also acts as a food source for the aquatic plants that need it. However, algae cannot eat apatite. SeDox Speed works for up to six weeks, depending on the initial amount of phosphate and reduces the content to below 0.035 mg/l during this time – a value at which algae growth no longer occurs excessively. SeDox Speed also supports the removal of organic sludge.