# Penn-Plax Cascade 1000 Canister Filter vs OASE BioMaster Thermo 850 Canister Filter: specs and price compared

A sourced, side-by-side comparison of the Penn-Plax Cascade 1000 Canister Filter (Penn-Plax) and OASE BioMaster Thermo 850 Canister Filter (OASE) among aquarium filters.

## Side by side

| Spec | Penn-Plax Cascade 1000 Canister Filter | OASE BioMaster Thermo 850 Canister Filter |
| --- | --- | --- |
| US price | not published | not published |
| Brand | Penn-Plax | OASE |
| 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 |

## Key differences

- 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

## Sources

- Penn-Plax Cascade 1000 Canister Filter: https://eorder.pennplax.com/ccf3ul (eorder.pennplax.com, verified 2026-08-01)
- OASE BioMaster Thermo 850 Canister Filter: https://www.aquaristikshop.com/aquaristik/OASE-Aussenfilter-BioMaster2-Thermo-850/788008/ (aquaristikshop.com, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/aquarium-filters/penn-plax-cascade-1000-vs-oase-biomaster-thermo-850/
Cite: Per The Front Desk Review, Penn-Plax Cascade 1000 Canister Filter (not published) vs OASE BioMaster Thermo 850 Canister Filter (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/aquarium-filters/penn-plax-cascade-1000-vs-oase-biomaster-thermo-850/
License: CC BY 4.0.