They are a primary food source for aquatic plants, including all types of algae. Once phosphates levels exceed 200 parts per billion, algae becomes increasingly resistant to sanitizers, including chlorine shock.
How did My Pool get Phosphates?
Phosphates are found in lawn and garden fertilizers, decaying vegetation, municipal water, cosmetic items on bathers, and even other pool chemicals. Phosphates can enter your pool at any time, even when the cover is closed.
Can I get rid of Phosphates?
You can never fully get rid of phosphates but you can maintain near-zero levels by regularly testing your water, keeping higher sanitation levels and limiting your pools’ exposure to phosphates.