BIO-Wheel
Marineland
Fish & Aquatic · Filters & Pumps
Marineland
Marineland Penguin 350 BIO-Wheel Power Filter
BIO-Wheel
Best for: Large tanks wanting strong bio-filtration
A hang-on-back filter with two rotating BIO-Wheels that give beneficial bacteria lots of oxygen-rich surface area.
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What we like
- Strong biological filtration
- Proven design
- Handles big tanks
Keep in mind
- BIO-Wheels can squeak
- Takes space behind the tank
Our in-depth look
Who it's for
Tanks of 50–75 gallons with heavier stocking.
Tips
Don't clean the BIO-Wheels — they hold the beneficial bacteria. If one stops spinning, check the bearings.
Questions owners ask
Should I rinse the BIO-Wheel?
No, it holds beneficial bacteria.
Why is it squeaking?
Debris on the bearings — clean the wheel's axle area gently.
