1. If the chlorine is high, and the algae appears dead, you can turn the pump off, and see if it will settle. Make sure the chlorine REMAINS high during this process.

2. If you want to try the clarifier, try to settle it FIRST. Some clarifiers help settling; others don't.

3. Don't backwash too much -- doing so reduces your ability to remove the dead algae. Let the filter pressure increase to 5 psi ABOVE the clean filter pressure, before backwashing.