02-03-2009, 07:34 PM
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Yeah, spring for an in-line piston air pump and hook it to a PVC loop over the tanks. You can get steel, brass, or plastic airhose taps from jehmco for pretty cheap. Put in 10 taps, put a pair of sponge or box filters in each tank, and away you go. This is the set up I am planning for my fishroom with 20 tanks or so. The in-line piston pumps will drive air for up to 50 tanks (depending on size) in absolute silence, and with incredible efficiency (it only works as hard as it needs to to keep the air pressure up, so the fewer taps in the air loop, the less work it does).
The other option is to put a sump with reticulated foam under them and either drill them of fit them with overflow boxes. I visited Discus Hans' place in Baltimore this summer, and that's essentially want he has going.