Dana, I mistakenly placed a frag of rainbow montipora on the top of a rock in my old tank under 250W DE MH's. It was getting a lot of PAR and quickly grew over everything it came in contact with. I eventually had to remove it with bone cutters. Mine liked high PAR. I know, not much help, just my experience. I left it out of the new tank even though it is one of the most beautiful montiporas I have seen. JP
