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
3.0/5
A cheap high-flow canister with a UV light built in, for owners fighting algae who accept sparse published specs.
- Up to 150 galTank size
- 525 gal/hFlow
Check price at Amazon$167.49
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Built-in 9 W UV sterilizer helps control green water
- 525 gal/h of flow at a low price
Cons
- Listing publishes no media volume, power draw or warranty
- Listing does not mention a primer or shutoff valves
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its tank size. How we rank explains each one.
Specifications
| Model number | HW-304B |
|---|---|
| Capacity | |
| Rated aquarium | Up to 150 gal |
| Pump output | 525 gal/h |
| Turnover | 3.5x per hour |
| Features | |
| Built-in UV | Yes |
Alternatives in this tank size
Fluval 407
#2 in 76 to 150 galFull review
The pick of the 07 range for 50 to 100 gallon tanks, with more media space for its rating than most rivals.
Amazon $256.99$256.99
50-100 gal383 gal/h6 L
EHEIM Classic 350 (2215)
#4 in 76 to 150 galFull review
A durable, plain canister for mid-sized tanks. Newer filters with primers and pre-filters are easier to service for a little more money.
Amazon $179.99$179.99
31-92 gal164 gal/h4 L
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