5 Steps to Eliminate Mustard Algae From Your Pool

Brush every surface Scrub walls, floor, ladder, skimmer, and filter. Mustard algae clings tight, so thorough brushing is essential.

Shock to 20-30 ppm free chlorine Standard shock levels won’t work. Raise free chlorine to 20-30 ppm and maintain it for 24-48 hours.

Run the pump nonstop Keep the pump running continuously during treatment. Backwash or clean the filter often, as it will clog quickly.

Brush daily and repeat if needed Brush every day. If algae returns, add an algaecide labeled for yellow or mustard algae. A phosphate remover can help with recurring issues.

Clean the pool cover Algae can hide on covers. Wash the cover thoroughly to prevent reinfestation.