Rinse frequently, deep-clean on a regular schedule, and replace when pleats remain discolored, damaged or restricted after cleaning.
Why spa filters load quickly
Hot tubs have high bather load relative to water volume. Skin oils, cosmetics and fine debris can foul pleats quickly even when the water looks clear.
Cleaning schedule
A light rinse every few weeks is common for regularly used tubs, with periodic deeper cleaning using a compatible cartridge cleaner.
Avoid high-pressure washing that can damage filter media.
When replacement is due
Replace the cartridge when pleats are torn, flattened, brittle or permanently clogged, or when flow remains restricted after proper cleaning.
Persistent cloudy water or frequent filter warnings can also signal reduced cartridge performance, though chemistry problems should be ruled out.