Hot Spring C30 Filter Cartridge fits the following Hot Spring Spas.
(NSF50)
- Aria
- Envoy
- Grandee
- Jetsetter
- Prodigy
- Propel
- Samoa
- Sovereign
- Square / SX
- Hotspot R
- Stride
- Triangle
- Triumph
- Vanguard
Have you tried the Tri-x Filter? These fit all pools with a C30 filter currently but have a long life (5-8 years) and are Dishwasher safe!