On Sat, 20 Nov 2004 07:31:32 -0800, "Billy"
wrote:


"Donegal Paul" wrote in
message ...
| Hi all, im a little confused by these, are they actually of any
real benefit
| at all?
|

They don't REMOVE ammonia and nitrites persay.
What they do is provide an excellent environment for the
bacterium that process the waste in your tank. The alternating
immersion\emmersion seems to be superior to media that is always
underwater.


I will say a good word for underwater bios. I have a 29 gallon JEBO
glass tank with a built in filtration system. It has small ceramic
donuts as part of the filtration. This tank is consistently clear and
clean.

dick