Mines mid tank, in medium flow, because it does put out a little slime everyonce in a while. I have 200 watts of pcs over my tank, its a 60 gallon, but its a corner bowfront so the lights are only 36" long, similar to a 40 gallon footprint.
I have gotten TONS of little polyps sprouting around the edges, its growing nicely, nice pretty blue body, with blue and purple polyps.