Originally Posted by jon_the_newb
#3 could be solved easily, with a little $$, of course (back to #1). UV Sterilizers on the return lines should stop any diseases that could be carried in the water.
Still not 100% effective.
I have only put UV's on a couple tanks and that was a few years back. The problem we had was dialing in the flow rate. It might be a little diffrent now. But I wouldnt put the UV on the return unless thats the only space I had to put it. Probley the best thing to do would have the UV set up so thats the first filter all your water goes through befor going into the other media. That way there is a lot less change of any sort of infection or anything spreding into everything else in there.