A healthier, more natural way to control algae formation. This highly concentrated formulation removes phosphates from water. Use initially to remove high levels of phosphate – in excess of 300 ppb. By removing phosphates (fertilizer), algae will be starved and made easy to eliminate by an approved sanitizer. One week after adding Dazzle phos Cleanse Plus, weekly use of Dazzle Assure will keep phosphate levels low and your pool water algae-free.