Aquaterra Spas hot tub filters
The Unicel 2026 Replacement Guide lists 1 of the cartridges on this site for Aquaterra Spas. Many tubs use only one of these, so measure your old filter or check the number printed on its end cap.
| Cartridge (Pleatco / Unicel / Filbur) | Diameter × length | Sq ft | Models | Aquaterra Spas OEM # | Source |
|---|---|---|---|---|---|
| PFF42TC-P4 / 5CH-37 / FC-2402 | 5-1/4" x 9-3/8" | 42 | not specified | 303279 | Unicel p.28 |
If your Aquaterra Spas filter isn't here, it may not be in our checked list yet. We only publish matches we can confirm in a manufacturer catalog.