I have a friend that has the 28 g with MH 150 W....with the closed canopy, it runs too hot....at least in south Texas, but he bought a clip-on fan and attached it to the back to cool the water...it has worked great.....Also, the protein skimmer that comes with it sucks, plan on getting another or doing without.....After all his modifications, it is one of the most kick butt cubes I have ever seen....It looks like a field of corals ......He has LPS, soft corals, and anemones ....