OASE BioMaster 2 250
#2 in Up to 75 galFull review
A convenient, well-built filter for tanks up to 70 gallons, at its best for owners who want a quick-rinse pre-filter.
Amazon $229.99$229.99
The OASE BioMaster 2 250 rates 3.7 among up to 75 gal aquarium canister filters; the EHEIM Classic 350 (2215) rates 2.8 among 76 to 150 gal ones. The EHEIM Classic 350 (2215) costs $50 less ($179.99 vs $229.99).
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
Scores side by side
These two sit in different tank size classes (up to 75 gal and 76 to 150 gal), and each is scored against the reference points for its own class, so a rating says how well each does among its own tank size peers. How we rank explains each factor.
| Factor weight | OASE BioMaster 2 250 | EHEIM Classic 350 (2215) |
|---|---|---|
| Overall rating | 3.7/5 | 2.8/5 |
| Value 25% | 34 $3.29 per rated gallon ($229.99, up to 70 gal) | 63 $1.96 per rated gallon ($179.99, up to 92 gal) |
| Media volume 20% | 87 4.4 L of media, 0.6 L per 10 rated gal | 52 4 L of media, 0.4 L per 10 rated gal |
| Turnover 20% | 59 250 gal/h for up to 70 gal, 3.6x per hour | 8 164 gal/h for up to 92 gal, 1.8x per hour |
| Efficiency 10% | 67 16.7 gal/h per watt (15 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 2 250 | EHEIM Classic 350 (2215) | |
|---|---|---|
| Capacity | ||
| Rated aquarium | Up to 70 gal | 31-92 gal |
| Pump output | 250 gal/h | 164 gal/h |
| Turnover | 3.6x per hour | 1.8x per hour |
| Max head height | 5.6 ft | 5.9 ft |
| Media | ||
| Media volume | 4.4 L | 4 L |
| Pre-filter volume | 0.4 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 | 15 W | 15 W |
| Warranty | 3 years | 2 years |