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 rates 3.7 among 76 to 150 gal aquarium canister filters; the EHEIM Classic 250 (2213) rates 2.8 among up to 75 gal ones. The EHEIM Classic 250 (2213) costs $105 less ($144.99 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 250 (2213)
#4 in Up to 75 galFull review
A proven, low-cost canister for tanks of 30 to 55 gallons. Flow is gentle, which suits planted tanks and slow-moving fish.
Amazon $144.99$144.99
Scores side by side
These two sit in different tank size classes (76 to 150 gal and up to 75 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 2 350 | EHEIM Classic 250 (2213) |
|---|---|---|
| Overall rating | 3.7/5 | 2.8/5 |
| Value 25% | 43 $2.78 per rated gallon ($249.99, up to 90 gal) | 56 $2.20 per rated gallon ($144.99, up to 66 gal) |
| Media volume 20% | 86 5.6 L of media, 0.6 L per 10 rated gal | 55 3 L of media, 0.5 L per 10 rated gal |
| Turnover 20% | 52 300 gal/h for up to 90 gal, 3.3x per hour | 7 116 gal/h for up to 66 gal, 1.8x per hour |
| Efficiency 10% | 80 18.8 gal/h per watt (16 W) | 53 14.5 gal/h per watt (8 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 250 (2213) | |
|---|---|---|
| Capacity | ||
| Rated aquarium | Up to 90 gal | Up to 66 gal |
| Pump output | 300 gal/h | 116 gal/h |
| Turnover | 3.3x per hour | 1.8x per hour |
| Max head height | 5.9 ft | 4.9 ft |
| Media | ||
| Media volume | 5.6 L | 3 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 | 8 W |
| Warranty | 3 years | 2 years |