A cartridge filter is a small component with a big impact on water quality. When it’s clogged, the pump has worse flow, disinfection works less effectively and the water spoils faster. So the filter isn’t enough to just rinse under water once in a while.
- Ideally keep two sets of filters and rotate them.
- Clean according to the instructions, not with aggressive household chemicals.
- Replace the filter if it’s deformed, greasy or can’t be cleaned.
- Check the exact size and type of fittings.
The choice of cartridge type depends on the pool’s load – a home pool with low use can go longer between replacements than a public hot tub with dozens of users a day. Cartridge filtration also doesn’t suit every type of water treatment; under a high load of organic debris, sand or glass filtration can be a more reliable choice. Consult the supplier about suitability for the actual operation, not just tank size.
For public facilities with high loads, it’s worth considering a combination of cartridge and upstream coarse filtration, which extends the interval between cleanings of the main cartridge. Keep a record of the last replacement date so you’re not left figuring out the filter’s condition only once water quality has already deteriorated.
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