5 Reasons Your Pool Has Foam and How to Fix It

Low calcium hardness Soft water creates foam. Test your water and add calcium hardness increaser if levels are low.

High phosphates Sunscreen, sweat, and leaves break down into phosphates, which act like soap. Use a phosphate remover to clear them.

Too much algaecide Overdosing algaecide can cause foam. Stop adding it and let the filter run.

Organic buildup after parties or rain Surfactants from body oils and debris create foam. Shock the pool to break down organics.

Clogged filter or poor circulation Foam lingers if the filter is dirty. Rinse the filter and add a clarifier to help push out particles.