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
The OASE BioMaster 2 600 is the better aquarium canister filter overall, rated 3.3 to 3.2. The OASE BioMaster 2 600 leads on media volume and features. The Fluval FX2 wins on turnover, value and efficiency. The Fluval FX2 costs $38 less ($296.99 vs $334.99).
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.
Fluval FX2
#6 in Over 150 galFull review
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.
Amazon $296.99$296.99
Which should you buy?
- Choose the OASE BioMaster 2 600 for media volume (6.8 L of media, 0.4 L per 10 rated gal vs 3.9 L of media, 0.2 L per 10 rated gal) and features (priming button or self-priming, shutoff valves, separate pre-filter, adjustable flow vs priming button or self-priming, shutoff valves).
- Choose the Fluval FX2 for turnover (475 gal/h for up to 175 gal, 2.7x per hour vs 350 gal/h for up to 160 gal, 2.2x per hour), value ($1.70 per rated gallon ($296.99, up to 175 gal) vs $2.09 per rated gallon ($334.99, up to 160 gal)) and efficiency (17.6 gal/h per watt (27 W) vs 15.2 gal/h per watt (23 W)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every over 150 gal aquarium canister filter; a clear win is highlighted. How we rank explains each one.
| Factor weight | OASE BioMaster 2 600 | Fluval FX2 |
|---|---|---|
| Overall rating | 3.3/5 | 3.2/5 |
| Value 25% | 59 $2.09 per rated gallon ($334.99, up to 160 gal) | 70 $1.70 per rated gallon ($296.99, up to 175 gal) |
| Media volume 20% | 50 6.8 L of media, 0.4 L per 10 rated gal | 13 3.9 L of media, 0.2 L per 10 rated gal |
| Turnover 20% | 20 350 gal/h for up to 160 gal, 2.2x per hour | 35 475 gal/h for up to 175 gal, 2.7x per hour |
| Efficiency 10% | 58 15.2 gal/h per watt (23 W) | 72 17.6 gal/h per watt (27 W) |
| Features 15% | 85 priming button or self-priming, shutoff valves, separate pre-filter, adjustable flow | 55 priming button or self-priming, shutoff valves |
| Warranty 10% | 50 3-year warranty | 50 3-year warranty |
Specifications
| OASE BioMaster 2 600 | Fluval FX2 | |
|---|---|---|
| Capacity | ||
| Rated aquarium | Up to 160 gal | Up to 175 gal |
| Pump output | 350 gal/h | 475 gal/h |
| Filter circulation | - | 343 gal/h |
| Turnover | 2.2x per hour | 2.7x per hour |
| Max head height | 6.6 ft | 6.9 ft |
| Media | ||
| Media volume | 6.8 L | 3.9 L |
| Pre-filter volume | 0.6 L | - |
| Canister volume | - | 10.6 L |
| Features | ||
| Primer | Yes | Yes |
| Shutoff valves | Yes | Yes |
| Separate pre-filter | Yes | - |
| Adjustable flow | Yes | - |
| Built-in UV | No | No |
| Built-in heater | No | No |
| Water-change valve | No | No |
| Power and build | ||
| Power draw | 23 W | 27 W |
| Warranty | 3 years | 3 years |