Leslies Black Algae Killer

Maintain a crystal-clear, algae-free pool with our Black Algae Killer. Its potent, blended formula effectively fights stubborn algae varieties, protecting your pool from future infestations. Enjoy pristine waters with just 1 qt. of our reliable algaecide.

Product Description

Black Algae Problem Solver! This unique blended formula is the best algaecide to use for stubborn algae such as black and mustard algae in all swimming pools.
Black Algae Killer in 1 qt.
Formulated to kill black algae
Prevents black algae
Kills mustard algae


12 oz for Visible Algae, 12 oz per 10,000 gallons and 2 oz every 2 weeks