Originally Posted by Jonnypro
I was just in another reefing forum and a guy had only 2 of these units over his 72x24x24. Here is the pic. It was a frag tank also. The only bad thing I can somewhat see is the middle had all shadows.
Go two place them closer to center to avoid shadows in the center little shadows on the sides can be for lower light corals if you don't like it buy another. Personal IMO
two will be sufficient hang them about 8" to 10" and you will have good coverage. Strong than you think. I went with reef breeders love them.