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 and the OASE BioMaster 2 850 are evenly matched, rated 3.3 and 3.3. The OASE BioMaster 2 600 leads on media volume and turnover. The OASE BioMaster 2 850 wins on value. The OASE BioMaster 2 600 costs $45 less ($334.99 vs $379.99).
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.
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
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 8 L of media, 0.4 L per 10 rated gal) and turnover (350 gal/h for up to 160 gal, 2.2x per hour vs 400 gal/h for up to 225 gal, 1.8x per hour).
- Choose the OASE BioMaster 2 850 for value ($1.69 per rated gallon ($379.99, up to 225 gal) vs $2.09 per rated gallon ($334.99, up to 160 gal)).
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 | OASE BioMaster 2 850 |
|---|---|---|
| Overall rating | 3.3/5 | 3.3/5 |
| Value 25% | 59 $2.09 per rated gallon ($334.99, up to 160 gal) | 71 $1.69 per rated gallon ($379.99, up to 225 gal) |
| Media volume 20% | 50 6.8 L of media, 0.4 L per 10 rated gal | 37 8 L of media, 0.4 L per 10 rated gal |
| Turnover 20% | 20 350 gal/h for up to 160 gal, 2.2x per hour | 8 400 gal/h for up to 225 gal, 1.8x per hour |
| Efficiency 10% | 58 15.2 gal/h per watt (23 W) | 62 16 gal/h per watt (25 W) |
| Features 15% | 85 priming button or self-priming, shutoff valves, separate pre-filter, adjustable flow | 85 priming button or self-priming, shutoff valves, separate pre-filter, adjustable flow |
| Warranty 10% | 50 3-year warranty | 50 3-year warranty |
Specifications
| OASE BioMaster 2 600 | OASE BioMaster 2 850 | |
|---|---|---|
| Capacity | ||
| Rated aquarium | Up to 160 gal | Up to 225 gal |
| Pump output | 350 gal/h | 400 gal/h |
| Turnover | 2.2x per hour | 1.8x per hour |
| Max head height | 6.6 ft | 7.4 ft |
| Media | ||
| Media volume | 6.8 L | 8 L |
| Pre-filter volume | 0.6 L | 0.7 L |
| Features | ||
| Primer | Yes | Yes |
| Shutoff valves | Yes | Yes |
| Separate pre-filter | Yes | Yes |
| Adjustable flow | Yes | Yes |
| Built-in UV | No | No |
| Built-in heater | No | No |
| Water-change valve | No | No |
| Power and build | ||
| Power draw | 23 W | 25 W |
| Warranty | 3 years | 3 years |