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This 60% poly algaecide is perfect for both preventing algae growth and killing existing black, green and yellow/mustard algae.

This 60% poly algaecide is perfect for both preventing algae growth and killing existing black, green and yellow/mustard algae.  It also helps to clear up cloudy water, and is not affected by pH.  Won�t stain surfaces or leave residue.  Non-foaming, non-metallic.  Swim immediately after use.  Use weekly to prevent algae growth.  Dosage: Use 4 oz. for every 10,000 gallons pool water for maintenance.