How often should a pool filter be cleaned?
Clean the filter when pressure rises meaningfully above its clean starting reading, not on a fixed date. On a Florida pool that usually means a deep clean a few times a year, more often during pollen season, after storms, and while recovering from algae.
Note the gauge reading right after a clean. That is your baseline. A steady climb above it means flow is restricted and the filter is due.
| Filter type | Routine | Notes |
|---|---|---|
| Cartridge | Remove and deep clean | Rinse thoroughly; soak when oily or scaled |
| DE | Backwash, then recharge | Full tear-down periodically |
| Sand | Backwash | Media replaced on a multi-year cycle |
Signs you waited too long
- Weak return jets and lazy surface flow
- Cloudy water even with correct chlorine
- Cleaner losing suction
- Pump straining or running hotter than usual
A clogged filter forces the pump to work against resistance, which shortens motor life. It is one of the cheapest pieces of maintenance to stay on top of.