02-26-2013, 05:19 PM
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Originally Posted by AbbeysDad
...It just seems to me that they would work equally well trapping larger particles as the smooth surface ceramic rings do....
The idea behind the ceramic rings as a "bio-media" is that the porosity of ceramic material allows a very large internal surface area for the growth of nitrifying bacteria. The problem is that it is mostly a gimmick, marketing. Some will argue against this but in order to take advantage of the internal surface area the water must pass through the ceramic material... not around it. This won't happen when the rings are just piled as the water will go around the ceramics, (path of least resistance). A closed ceramic tube with pressurized water flow would do it but that is not happening in any regular canister system.
So the ceramics are a waste of space... they don't actually filter anything that gets through the filter tray screening. A course sponge has more useable internal surface area as the water can be forced through it at the very low pressures we use in a canister filtration system.
If you have a planted tank, even if they did work, they wouldn't be needed anyway.
Originally Posted by MoneyMitch
u mentiuon the nylon pot scrubbers, ive heard of some of them having a anti bacterail coating or something on them since they sit around in a drawer or on the sink edge when not in use. think it was in some diy sump article i read a while back cause if you get the sponges espcially they have a damp feeling to them safe to assume thats the antibacterial whatever?
The dollar store ones won't be treated... but some scubbers are, usually the sponge ones. I buy cheap ones in a four pack for the kitchen, green, yellow, red and blue I think. An elastic band holds it in shape, pretty cheap.
Oh, AD posted a pic.
Last edited by JDM; 02-26-2013 at 05:20 PM..
Reason: added pic comment... too slow writing today, at work