IME, most of these encrusting montipora are very slow growers. Watching paint grow would be more exciting. They are also fairly hard to keep. I have had most of the more popular ones and have lost most of them the first time around. I now have the 2nd phase and they are doing much better. The water quality has to be spot on and not one level off even for a very short time. As beautiful as they are the are a handful trying to keep and grow. They are fussy about the lighting it seems most.