OASE BioMaster 2 350
#1 in 76 to 150 galFull review
A top choice for 55 to 90 gallon tanks, pairing lots of media with the easiest pre-filter cleaning here.
Amazon $249.99$249.99
Up to 90 gal300 gal/h5.6 L
4 OASE canister filters ranked. Each one is scored and ranked against every brand in its tank size, so "#3 mid-size" means third of all mid-size canister filters here, not third among OASE's own.
OASE makes 4 current canister filters: 1 up to 75 gal, 1 76 to 150 gal and 2 over 150 gal. Prices run from $229.99 for the OASE BioMaster 2 250 to $379.99 for the OASE BioMaster 2 850. Its best-rated model in each size: the OASE BioMaster 2 250 (#2 of 8 up to 75 gal, rated 3.7), the OASE BioMaster 2 350 (#1 of 6 76 to 150 gal, rated 3.7) and the OASE BioMaster 2 600 (#4 of 7 over 150 gal, rated 3.3).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
OASE canister filters 4
- OASE BioMaster 2 350#1 76 to 150 galFull review
A top choice for 55 to 90 gallon tanks, pairing lots of media with the easiest pre-filter cleaning here.
Amazon $249.99$249.99Up to 90 gal300 gal/h5.6 L - OASE BioMaster 2 250#2 up to 75 galFull review
A convenient, well-built filter for tanks up to 70 gallons, at its best for owners who want a quick-rinse pre-filter.
Amazon $229.99$229.99Up to 70 gal250 gal/h4.4 L - OASE BioMaster 2 600#4 over 150 galFull review
A media-heavy filter for tanks up to 160 gallons, for owners who value biological capacity over raw flow.
Amazon $334.99$334.99Up to 160 gal350 gal/h6.8 L - OASE BioMaster 2 850#5 over 150 galFull review
The most media in one canister here. On tanks near 225 gallons, add a powerhead for flow.
Amazon $379.99$379.99Up to 225 gal400 gal/h8 L
