"matt23983" wrote in message
s.com...
Does all biofiltration have to be wet/dry as in the bio-wheel?
Would it be feasable for me to get a couple of bio-balls and drop them
into my Aqua-Tech 5-15 filter, would that work or do the bio-balls need
to be wet/dry?

Biologic filtration works submersed too. It's just that it isn't quite as
efficient
because, with a wet/try or trickle filter, the bacteria get more oxygen to
work with. But you could certainly do what you suggest, and it would work.
But, instead of bio-balls, I'd consider sintered glass (such Ehfi Substrat or
similar). I think you get more surface area per volume that way than you do
with bio-balls.

Cheers,

Michi.

--
Michi Henning Ph: +61 4 1118-2700
ZeroC, Inc. http://www.zeroc.com