Greg i know this might not be the problem but I notice that you bought Corals from Mr. coral before and I did to what I notice is my Mr. Corals frag are not growing they are still small and taking forever to grow and all the frags that I got from local club members and known vendors are all growing fast so I think it has to do with mr coral frags been fresh cut mariculture corals that's my believe. But that's what I'm going through. His frags are small to begin with most being not even half inch