I have a coralife 65 with those mods I talked about, dont know if you'ld be interested. As far as skimming a tank or not, Ive seen both ways done on large and small tanks. Personally i have skimmers on my tanks but didnt in the first place. It does pull alot of crud out of the tank so it makes me feel like its doing something. I have the Aqua C skimmers, very awesome and works wether you have a sump or not, but they are intended for HOB use.