Quantum® Pool
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Black and/or Dark Green Spots

Possible Cause Solution Preventative Maintenance

Black algae

Use Quantum® Q-Shock II per directions. Add Quantum® Quash! or Quantum® Terminator II as directed, then brush daily until gone. Use ​Quantum® Hy-Floc to help remove dead algae.

Use ​Quantum® Quash! (4 -8 fl. oz. per 10,000 gallons) weekly to prevent algae growth. Adjust returns to provide better flow over affected area.