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 is the better aquarium canister filter overall, rated 3.7 to 2.8. The OASE BioMaster 2 250 leads on turnover, features and media volume. The EHEIM Classic 250 (2213) wins on value. The EHEIM Classic 250 (2213) costs $85 less ($144.99 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 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
Which should you buy?
- Choose the OASE BioMaster 2 250 for turnover (250 gal/h for up to 70 gal, 3.6x per hour vs 116 gal/h for up to 66 gal, 1.8x per hour), features (priming button or self-priming, shutoff valves, separate pre-filter, adjustable flow vs shutoff valves) and media volume (4.4 L of media, 0.6 L per 10 rated gal vs 3 L of media, 0.5 L per 10 rated gal).
- Choose the EHEIM Classic 250 (2213) for value ($2.20 per rated gallon ($144.99, up to 66 gal) vs $3.29 per rated gallon ($229.99, up to 70 gal)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every up to 75 gal aquarium canister filter; a clear win is highlighted. How we rank explains each one.
| Factor weight | OASE BioMaster 2 250 | EHEIM Classic 250 (2213) |
|---|---|---|
| Overall rating | 3.7/5 | 2.8/5 |
| Value 25% | 34 $3.29 per rated gallon ($229.99, up to 70 gal) | 56 $2.20 per rated gallon ($144.99, up to 66 gal) |
| Media volume 20% | 87 4.4 L of media, 0.6 L per 10 rated gal | 55 3 L of media, 0.5 L per 10 rated gal |
| Turnover 20% | 59 250 gal/h for up to 70 gal, 3.6x per hour | 7 116 gal/h for up to 66 gal, 1.8x per hour |
| Efficiency 10% | 67 16.7 gal/h per watt (15 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 2 250 | EHEIM Classic 250 (2213) | |
|---|---|---|
| Capacity | ||
| Rated aquarium | Up to 70 gal | Up to 66 gal |
| Pump output | 250 gal/h | 116 gal/h |
| Turnover | 3.6x per hour | 1.8x per hour |
| Max head height | 5.6 ft | 4.9 ft |
| Media | ||
| Media volume | 4.4 L | 3 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 | 8 W |
| Warranty | 3 years | 2 years |