5 Steps to Fix Slimy Pool Water

Test your water first Low chlorine, high pH, or poor circulation are the usual causes of algae buildup.

Shock the pool Follow the label instructions for your pool size and apply a strong shock treatment.

Brush every surface Scrub the walls and floor to break up the algae biofilm so the chlorine can reach it.

Run the filter continuously Keep the pump running for 24 hours after shocking to circulate and remove dead algae.

Check pH, alkalinity, and phosphates If pH or alkalinity are off, chlorine won’t work effectively. Phosphates from lawn runoff or debris can feed algae, so use a phosphate remover if the problem persists.