I just got a nice blastomussa frag with 2 1/2 heads on it (3 mouths) and was wondering the best method is to grow it out for future propagation and then letting it grow into a nice colony. Like with GSP I just put a piece of rock beside it so it will spread onto the rock for example or do they just build up on there own ? I'm guessing it will spread new heads on a rock beside it. Any help appreciated.