4 Steps to Remove Algae From a Pool

Scrub with a stiff-bristle pool brush Algae clings to rough surfaces like steps and corners, and chemicals alone won’t dislodge the biofilm. Use a brush with angled bristles for tight spots.

Shock the pool with chlorine After scrubbing, apply a chlorine shock to kill remaining spores. A non-chlorine shock works if you want to swim sooner.

Use a pumice stone for stubborn spots For white water mold or black algae on plaster, try a pumice stone. Test an inconspicuous spot first—it can scratch the surface.

Skip expensive algae removers A brush and chlorine do the same job for less money. The secret is elbow grease, not pricey products.