Algae Problems

Clogged Filter

PAPER OR CLOTH FILTER CARTRIDGE TYPE:
These will have to be removed and washed. If this doesn't help you can try soaking the filter overnight is Tri-Sodium Phosphate (TSP) available from hardware stores.
If all else fails you will have to buy a new filter cartridge.
SAND FILTER:
Try backwashing the filter first. If this doesn't help, you may have to take the filter apart and inspect it for a clogged membrane. You will have to replace the sand and possibly the membrane. See a pool professional.
DIATOMACEOUS EARTH (DE) FILTER:
Try backwashing the filter first. After you backwash, you'll have to add DE powder in the amount recommended by the manufacturer. If this doesn't help, you have may have a problem with filter membrane. See a pool professional.

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