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