As stated, most of the LPS are in the sump, located in the center compartment, with an area that's 4.5x9". I tried placing them on the bottom, but debris tends to collect on the bottom so I wanted to lift them off the surface. I ended up with a magnet rack, customized at 3.5x7.5". I opted not to get the full size rack at 4x8" since I wanted a bit of space on the left to attach some magnetic disc. Currently these are sitting in the sump, back to front. UA miami hurricane Aquascene golden eye UA pumpkin explosion Ocean eye chalice Art's spice yuma Freebie orange eye green chalice from Karson UA red chalice FR aussie rainbow micromussa Pink chalice from Lam Tyree big mouth war coral red/green micromussa Aussie red/blue micromussa Fragglereef astreopora On the bottom sits a blue w/green ring yuma and a small colony of blasto merletti. The merletti that the rock was on is too big to put anywhere else, so it sits down there. Yuma didn't like the lighting in the display tank so it's happily been chilling down in the sump. On the mag disc is the fire engine monti that Jeremy brought to the BBQ and the other is the pink eye Montastrea from Atlantis that Norm, Ian and I split.