I have a 14 gallon biocube in my dorm/apartment with a pair of maroon clowns and two clowns. That tank is jsut under a year old and it is doing well. I'm sure your tank and fish will do extremely well, definitely need a good metal halide though, I didn't have one for a few months and my anemones suffered, especially the RBTA. But they are doing much better since I added my 150W MH.
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