OASE BioMaster 2 600
#4 in 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$334.99
Up to 160 gal350 gal/h6.8 L
3.2/5
A compact high-flow canister for large tanks. Its media space is modest for the rating, so it suits tanks well under 175 gallons best.
- Up to 175 galTank size
- 475 gal/hFlow
- 3.9 LMedia
- 27 WPower
Check price at Amazon$296.99
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Self-starting pump primes itself and purges trapped air every 12 hours
- Only 16.5 in tall, so it fits under most stands
- Pumps 475 gal/h on 27 W
Cons
- No water-change valve, unlike the FX4 and FX6
- 3.9 L of basket space is small for a 175 gallon rating
The Fluval FX Series family
Every Fluval FX Series model we rank, smallest first. Ratings compare each against its own tank size.
| Model | Tank size | Rating | Price |
|---|---|---|---|
| Fluval FX2 (this one) | Up to 175 gal | 3.2/5 | $296.99 |
| Fluval FX4 | Up to 250 gal | 3.4/5 | $337.99 |
| Fluval FX6 | Up to 400 gal | 3.4/5 | $406.99 |
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 | A213 |
|---|---|
| Capacity | |
| Rated aquarium | Up to 175 gal |
| Pump output | 475 gal/h |
| Filter circulation | 343 gal/h |
| Turnover | 2.7x per hour |
| Max head height | 6.9 ft |
| Media | |
| Media volume | 3.9 L |
| Canister volume | 10.6 L |
| Features | |
| Primer | Yes |
| Shutoff valves | Yes |
| Built-in UV | No |
| Built-in heater | No |
| Water-change valve | No |
| Power and build | |
| Power draw | 27 W |
| Warranty | 3 years |
Alternatives in this tank size
OASE BioMaster 2 850
#5 in Over 150 galFull review
The most media in one canister here. On tanks near 225 gallons, add a powerhead for flow.
Amazon $379.99$379.99
Up to 225 gal400 gal/h8 L
Penn-Plax Cascade 1500
#7 in Over 150 galFull review
A five-basket canister for large tanks on a budget. Plan on extra circulation for tanks near its rating.
Amazon $265$265
Up to 200 gal350 gal/h
Compare
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