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Re: sand w/ RFUGF
I run three 55s with dark gray basaltic sand over UGF. I was running one of
them in reverse for a few months. I haven't noticed any difference running
them either way.
A few points:
I don't rely on the UGF for particle filtration, because with sand it just
doesn't work very well. I use a small powerhead with sponge filter for that
A healthy population of trumpet snails keeps the sand loose.
One way I have used to inject CO2 is thru a tube run under the plate. It
works very well, and when a large enough bubble builds up it errupts thru
the substrate or up a riser tube.
Everything about the freshwater tropical aquarium - http://www.fintrek.com/