I'm setting up a 125 and eventually tearing down the 75. I'm still trying to convince my wife we need the 110 lobster tank as a frag tank...I've got 3 tanks up right now. A red sea 625xxl, IM Sr80 and IM 25 lagoon used as a frag. I've been thinking of turning the 80 into another frag tank I've got so much and maintenance in 2 displays that size is constant. Frags are alot easier to maintain that's for sure.