A healthier, more natural way to help control algae. Super concentrated formula removes phosphates from pool water. Use initially to remove high levels of phosphates - levels in excess of 300 ppb. By removing phosphates (fertilizer), you starve algae, allowing approved sanitizers to easily kill them. One week after addition of Dazzle� Phos Cleanse Plus, commence weekly maintenance applications of Dazzle� Assure to keep phosphate levels low and water dazzling clear and algae-free.