bio wheel

999 Views 7 Replies 6 Participants Last post by Diana, Aug 19, 2014

RoedyGreen

Discussion Starter · #1 · Aug 17, 2014

A Marineland 100 external filter came with my tank. It has a "bio wheel". It looks like a water wheel, made of corrogated paper product. It looks as if it is supposed to spin. However it does not, though it will spin freely if I pour some water on at. Is that normal?

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FatherLandDescendant

· Registered

Joined Jul 24, 2014

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1,535 Posts

#6 · Aug 19, 2014

RoedyGreen said:
It seems to be spiing now. Oddly squeezing the sides seemed to free it up.
What does it do?

It collects bacteria that help break down the toxins that are created from left over fish food and poop.

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