How often should you clean pool cartridge filters?

The calendar is a rough guide, but pressure is the real signal. Cartridge filters need cleaning on a rhythm that depends on bather load, debris, and season, and the surest rule is to watch the gauge, not just the date.

The pressure rule

Note the clean starting pressure after a proper deep clean. When the gauge climbs 8 to 10 psi above that baseline, flow is restricted enough that it is time to clean again. This single habit prevents the slow strangling of a system that owners rarely notice until circulation suffers.

A practical schedule

For most residential pools, a deep clean every four to six weeks in season is typical, more often for heavily used pools or dusty environments. The key is that a fast, deep clean makes staying on schedule painless, so filters never reach the point where debris bakes in.

What happens if you wait too long

A neglected cartridge restricts flow, strains the pump, and can let unfiltered water cloud the pool. Debris that sits too long becomes far harder to remove. Cleaning deeper and more often, with a tool that makes it quick, protects both the equipment and the water.