Penn-Plax
Penn-Plax Cascade 1000 Canister Filter
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Best Aquarium Filters · head-to-head
Penn-Plax Cascade 1000 Canister Filter vs OASE BioMaster Thermo 850 Canister Filter
A sourced, side-by-side comparison. Penn-Plax Cascade 1000 Canister Filter is cheaper at —. 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 | Penn-Plax Cascade 1000 Canister Filter |  OASE BioMaster Thermo 850 Canister Filter |
|---|---|---|
| US price | — | — |
| Brand | Penn-Plax | OASE |
| Released | — | — |
| Type | canister | canister |
| Flow rate gph | 265 | 400 |
| Tank size gal | 100 | 250 |
| Media capacity (L) | — | 8 |
| Media stages | 3 | 4 |
| Wattage | 28.5 | 32 |
| Self priming | Yes | Yes |
| Dimensions (in) | 11.5 x 10 x 17 | 9.4 x 9.4 x 21.1 |
Sources — Penn-Plax Cascade 1000 Canister Filter: eorder.pennplax.com (verified 2026-08-01). OASE BioMaster Thermo 850 Canister Filter: aquaristikshop.com (verified 2026-08-01).
What's the difference between the Penn-Plax Cascade 1000 Canister Filter 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: Penn-Plax Cascade 1000 Canister Filter 265 vs OASE BioMaster Thermo 850 Canister Filter 400
- Tank size gal: Penn-Plax Cascade 1000 Canister Filter 100 vs OASE BioMaster Thermo 850 Canister Filter 250
- Media stages: Penn-Plax Cascade 1000 Canister Filter 3 vs OASE BioMaster Thermo 850 Canister Filter 4
- Wattage: Penn-Plax Cascade 1000 Canister Filter 28.5 vs OASE BioMaster Thermo 850 Canister Filter 32
- Dimensions (in): Penn-Plax Cascade 1000 Canister Filter 11.5 x 10 x 17 vs OASE BioMaster Thermo 850 Canister Filter 9.4 x 9.4 x 21.1