Imforbis im not wanting many fish in the 40 and that will be one of those fun reef tanks. 2quills Im wanting to do a 75 and a 40 display with a 40 sump. I have bought 6 tanks in the past month, yes im addicted again, so I have a 75, 2 40's and 3 10's. Would a 10 gal refugium be too big?