Your pool filter is one of the hardest-working parts of your pool system. It traps dirt, leaves, oils, and even microscopic debris that would otherwise make your water cloudy. But just like any filter, it needs regular cleaning to do its job properly.
So, how often should you clean your pool filter? The answer depends on the type of filter you have, how much you use your pool, and the environment around it.
1. Cartridge Pool Filters
Cartridge filters are common in Florida because they handle debris well and don’t require backwashing.
- Cleaning frequency: Every 2–6 weeks during swim season.
- Deep cleaning: At least twice a year, soak the cartridges in a filter cleaner solution.
- Replacement: Every 2–3 years, depending on usage.
2. Sand Pool Filters
Sand filters use silica sand to trap debris and are durable and low-maintenance.
- Backwashing: Every 4–6 weeks or when the pressure gauge rises 8–10 PSI above normal.
- Deep cleaning: Once a year with a sand filter cleaner.
- Replacement: Every 5–7 years, replace the sand.
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3. DE (Diatomaceous Earth) Pool Filters
DE filters are known for providing the cleanest, most polished water.
- Backwashing: About once every 4–6 weeks.
- DE powder replacement: Add fresh DE powder after each backwash.
- Deep cleaning: At least once a year, disassemble and clean the entire filter grid.
4. Factors That Affect Cleaning Frequency
How often you clean your pool filter also depends on:
- Pool usage: Heavy use = more frequent cleaning.
- Weather: Rain, storms, and wind bring in debris.
- Surroundings: Trees, leaves, and pollen can clog filters faster.
- Algae growth: If your pool has algae, expect to clean the filter more often.
For most pools, plan on cleaning your filter every month during the swim season and doing a deep clean at least once a year. Regular maintenance not only keeps your water sparkling but also extends the life of your filter and equipment.
If you’d rather skip the hassle, a professional pool service can keep your filters and entire system in top shape year-round.
Trusted resource: Florida Detail – pool cleaning in Charlotte County

