SunSun
SunSun HW-304B Canister Filter with UV Sterilizer
$178.99
Best Aquarium Filters · head-to-head
SunSun HW-304B Canister Filter with UV Sterilizer vs OASE BioMaster Thermo 850 Canister Filter
A sourced, side-by-side comparison. SunSun HW-304B Canister Filter with UV Sterilizer is cheaper at $178.99. Every spec and price links to its source.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | SunSun HW-304B Canister Filter with UV Sterilizer |  OASE BioMaster Thermo 850 Canister Filter |
|---|---|---|
| US price | $178.99 | — |
| Brand | SunSun | OASE |
| Released | — | — |
| Type | canister | canister |
| Flow rate gph | 525 | 400 |
| Tank size gal | 150 | 250 |
| Media capacity (L) | — | 8 |
| Media stages | 5 | 4 |
| Wattage | 55 | 32 |
| Self priming | Yes | Yes |
| Dimensions (in) | 11 x 11 x 17 | 9.4 x 9.4 x 21.1 |
Sources — SunSun HW-304B Canister Filter with UV Sterilizer: mingllc.com (verified 2026-08-01). OASE BioMaster Thermo 850 Canister Filter: aquaristikshop.com (verified 2026-08-01).
What's the difference between the SunSun HW-304B Canister Filter with UV Sterilizer and OASE BioMaster Thermo 850 Canister Filter?
Where the two actually differ on the specs we track (5 of 8). Matching specs are omitted.
- Flow rate gph: SunSun HW-304B Canister Filter with UV Sterilizer 525 vs OASE BioMaster Thermo 850 Canister Filter 400
- Tank size gal: SunSun HW-304B Canister Filter with UV Sterilizer 150 vs OASE BioMaster Thermo 850 Canister Filter 250
- Media stages: SunSun HW-304B Canister Filter with UV Sterilizer 5 vs OASE BioMaster Thermo 850 Canister Filter 4
- Wattage: SunSun HW-304B Canister Filter with UV Sterilizer 55 vs OASE BioMaster Thermo 850 Canister Filter 32
- Dimensions (in): SunSun HW-304B Canister Filter with UV Sterilizer 11 x 11 x 17 vs OASE BioMaster Thermo 850 Canister Filter 9.4 x 9.4 x 21.1