Description
Black algae is a similar to mold and is more likely to form on concrete pools because they are more porous. It is usually more difficult to remove than green algae. For best results make sure all debris is removed from pool, brush the effected area, shock the pool, allow a few days for the shock to circulate. then add Black algae out brush and vacuum again, then add the full bottle for severe issues and 4 ounces per 10,000 gallons every 2 weeks as a preventative.
Add 16 oz to treat Algae for 10000 gallons Pool/Water
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