Phosphates are a common and natural contaminant found in pool water. They come from everyday sources like rain, dust, lawn fertilizers, leaves, and even your hose water. The most well-maintained pool can still develop elevated phosphate levels over time.
Phosphates themselves aren’t harmful, but they act as a food source for algae. When phosphate levels get too high, it becomes much easier for algae to grow—even in a pool that is otherwise properly balanced. This can lead to cloudy water, increased chemical demand, and more frequent maintenance issues.
Phosphates are removed using a specialized treatment that binds to them and clumps them together, allowing them to be captured by the filter. Once phosphates have been successfully removed, it’s important to service the filter as well—cartridge filters need to be replaced, and D.E. filters will need to be opened and thoroughly cleaned, to remove any residual buildup and prevent phosphates from re-entering the pool.
Routine weekly service focuses on maintaining proper water balance, sanitation, and overall cleanliness. Phosphate removal is considered a specialty treatment and is not included in regular service. If elevated levels are detected, a separate treatment may be recommended to keep your pool in optimal condition.
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