5 Steps to Remove Black Algae From a Pool

Scrub with a stainless steel brush Black algae roots into concrete pores, so nylon brushes won’t work. Scrub until the black cloud dissipates.

Shock the pool with triple the normal chlorine level Chemicals alone won’t kill the roots. High chlorine is needed after scrubbing to finish the job.

Scrub every day for a week The algae will keep trying to regrow until the roots are completely removed. Persistence is key.

Prevent regrowth with weekly brushing and balanced chlorine Brush walls weekly and keep chlorine in range. Don’t let phosphates build up.

Treat dark spots early with a high-chlorine puck Place a puck directly on the spot for a day. Early action stops the problem from spreading.