Phosphates may be present in water and are a source of algae growth. These tablets offer the solution to treat the cause and not the consequence.Pre-dose to 15 m³. This product allows the phosphates present in the water to be eliminated in the pool start. This treatment also reduces the use of Anti-algae products and the over. Dosage: oxidizing products. Dosage: Initial treatment: Analyze phosphate content with a phosphate analyzer. Add a tablet to remove 100 ppb phosphate every 15 m³. With the clean filter, add the required amount of skimmer tablets and filter for 24h. Check the phosphate level and repeat the operation if necessary. Careful Do not mix with any other product on skimmer (chlorine, Flocculant, etc ...). Add it alone. Maintenance Treatment: Test the phosphate level once a month and repeat the treatment when necessary.