Aqua Silk®
Please select a brand:

Black and/or Dark Green Spots

Possible Cause Solution Preventative Maintenance

Black algae

Use Aqua Silk® Chlorine-Free Shock Oxidizer per directions. Add Aqua Silk® Algaecide as directed, then brush daily until gone. Use non-alum flocculent such as GLB® Drop N’ Vac® flocculent to help remove dead algae.

Use Aqua Silk® Algaecide (1 1/4 fl. oz. per 10,000 gallons) weekly to prevent algae growth. Adjust returns to provide better flow over affected areas.