Sand and cartridge filters are the two most common pool filtration types. Neither is universally ‘better’ — the right choice depends on your pool’s flow rate, maintenance preferences, and space constraints.
| Attribute | Sand Filter | Cartridge Filter |
|---|---|---|
| Filtration fineness | Coarser — typically down to ~20 microns | Finer — typically down to ~10–15 microns |
| Maintenance method | Backwashing (uses extra water) | Removing and hosing off / periodic replacement (no backwash water use) |
| Media replacement interval | Manufacturer-dependent, generally longer intervals | Manufacturer-dependent, cartridges typically need replacement more often than sand |
| Typical footprint | Larger tank footprint for a given flow rate | Often more compact for a given flow rate |
| Water use during cleaning | Uses pool water during each backwash cycle | Uses little to no pool water during cleaning |
Summary
Sand filters are a simple, well-understood option with a longer typical media life, at the cost of periodic backwash water use and coarser filtration. Cartridge filters generally filter finer and don’t require backwashing, at the cost of a manual cleaning/replacement routine and typically more frequent cartridge replacement. Neither is a universal ‘better’ choice — the correct filter, and its exact size, should be selected based on your project’s actual required flow rate using the Filter Calculator, not on the filter type alone.