I have a 37 gallon I run with an Eclipse hood. There's a PC retrofit out there somewhere, but I haven't gotten it. Right now I just have LR, a couple of clowns and some softies. The light in there now is having a hard time keeping palys open, so I can't imagine it will do much more than shrooms. I put my heater where the carbon cartridge goes, and I have LR rubble where the bio wheel would normally go.