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
The OASE BioMaster 2 350 is the better aquarium canister filter overall, rated 3.7 to 2.8. The OASE BioMaster 2 350 leads on features, turnover and media volume. The EHEIM Classic 350 (2215) wins on value. The EHEIM Classic 350 (2215) costs $70 less ($179.99 vs $249.99).
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.
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
Which should you buy?
- Choose the OASE BioMaster 2 350 for features (priming button or self-priming, shutoff valves, separate pre-filter, adjustable flow vs shutoff valves), turnover (300 gal/h for up to 90 gal, 3.3x per hour vs 164 gal/h for up to 92 gal, 1.8x per hour) and media volume (5.6 L of media, 0.6 L per 10 rated gal vs 4 L of media, 0.4 L per 10 rated gal).
- Choose the EHEIM Classic 350 (2215) for value ($1.96 per rated gallon ($179.99, up to 92 gal) vs $2.78 per rated gallon ($249.99, up to 90 gal)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 76 to 150 gal aquarium canister filter; a clear win is highlighted. How we rank explains each one.
| Factor weight | OASE BioMaster 2 350 | EHEIM Classic 350 (2215) |
|---|---|---|
| Overall rating | 3.7/5 | 2.8/5 |
| Value 25% | 43 $2.78 per rated gallon ($249.99, up to 90 gal) | 63 $1.96 per rated gallon ($179.99, up to 92 gal) |
| Media volume 20% | 86 5.6 L of media, 0.6 L per 10 rated gal | 52 4 L of media, 0.4 L per 10 rated gal |
| Turnover 20% | 52 300 gal/h for up to 90 gal, 3.3x per hour | 8 164 gal/h for up to 92 gal, 1.8x per hour |
| Efficiency 10% | 80 18.8 gal/h per watt (16 W) | 31 10.9 gal/h per watt (15 W) |
| Features 15% | 85 priming button or self-priming, shutoff valves, separate pre-filter, adjustable flow | 25 shutoff valves |
| Warranty 10% | 50 3-year warranty | 25 2-year warranty |
Specifications
| OASE BioMaster 2 350 | EHEIM Classic 350 (2215) | |
|---|---|---|
| Capacity | ||
| Rated aquarium | Up to 90 gal | 31-92 gal |
| Pump output | 300 gal/h | 164 gal/h |
| Turnover | 3.3x per hour | 1.8x per hour |
| Max head height | 5.9 ft | 5.9 ft |
| Media | ||
| Media volume | 5.6 L | 4 L |
| Pre-filter volume | 0.5 L | - |
| Features | ||
| Primer | Yes | No |
| Shutoff valves | Yes | Yes |
| Separate pre-filter | Yes | No |
| Adjustable flow | Yes | - |
| Built-in UV | No | No |
| Built-in heater | No | No |
| Water-change valve | No | No |
| Power and build | ||
| Power draw | 16 W | 15 W |
| Warranty | 3 years | 2 years |