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Cal-Hypo > Ask Joe Pool > Pool Care > Troubleshooting: Algae
Troubleshooting: Algae
| Cause |
Immediate Corrective Action |
Preventive Follow-up |
For Green or Black Algae, or Pink Bacteria
Low chlorine
Poor circulation |
Check filter for proper operation and clean if dirty.
Use Sustain Shock Treatment according to label directions. |
Maintain 1-3 ppm Free Available Chlorine (FAC). Re-dose Shield if <1.5 ppm. Adjust water return lines to improve circulation if needed. |
| For Yellow (Mustard) Algae |
Use an ammonium-based mustard algaecide with Sustain Shock Treatment according to label directions. |
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