I have the smallest version over an IM Micro 30 tank. I have only had frags in for a few weeks, but After the colors were slightly muted for a couple of weeks they're all coloring up nicely now. Xenia on bottom growing quickly, frogspawn 1/3 up happy/growing slowly, zoas/gb palys/cloves/setosa frag all doing well too. Though everything seems like it's going well I think I'm gonna upgrade to a360we for peace of mind and to not even make me think about where to place things.