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 Penn-Plax Cascade 700 rates 2.6 among up to 75 gal ones. The Penn-Plax Cascade 700 costs $92.72 less ($157.27 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.
Penn-Plax Cascade 700
#5 in Up to 75 galFull review
A budget canister for tanks up to 65 gallons. It costs less than the big names but uses more power and says less about its media space.
Amazon $157.27$157.27
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 | Penn-Plax Cascade 700 |
|---|---|---|
| Overall rating | 3.7/5 | 2.6/5 |
| Value 25% | 43 $2.78 per rated gallon ($249.99, up to 90 gal) | 51 $2.42 per rated gallon ($157.27, up to 65 gal) |
| Media volume 20% | 86 5.6 L of media, 0.6 L per 10 rated gal | 0 media volume not published, scored as none |
| Turnover 20% | 52 300 gal/h for up to 90 gal, 3.3x per hour | 38 185 gal/h for up to 65 gal, 2.8x per hour |
| Efficiency 10% | 80 18.8 gal/h per watt (16 W) | 9 7.4 gal/h per watt (25 W) |
| Features 15% | 85 priming button or self-priming, shutoff valves, separate pre-filter, adjustable flow | 70 priming button or self-priming, shutoff valves, adjustable flow |
| Warranty 10% | 50 3-year warranty | 0 warranty not published, scored as none |
Specifications
| OASE BioMaster 2 350 | Penn-Plax Cascade 700 | |
|---|---|---|
| Capacity | ||
| Rated aquarium | Up to 90 gal | Up to 65 gal |
| Pump output | 300 gal/h | 185 gal/h |
| Turnover | 3.3x per hour | 2.9x per hour |
| Max head height | 5.9 ft | - |
| Media | ||
| Media volume | 5.6 L | - |
| Pre-filter volume | 0.5 L | - |
| Media baskets | - | 2 |
| Features | ||
| Primer | Yes | Yes |
| Shutoff valves | Yes | Yes |
| Separate pre-filter | Yes | No |
| Adjustable flow | Yes | Yes |
| Built-in UV | No | No |
| Built-in heater | No | No |
| Water-change valve | No | No |
| Power and build | ||
| Power draw | 16 W | 25 W |
| Warranty | 3 years | - |