Black Algea Killer and Chlorine Consumption

If the Leslies stuff, copper AND ammonia! A double whamy. Lots of chlorine will be needed to remove that vile stuff.
 
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Yes, it’s Leslie’s Black Algea Killer. I had something from before I started using liquid Chlorine and noticed some of the Black Algea had returned, so I gave it a treatment and my Chlorine level went way down.
 
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