I have a small zoa, maybe 20 polyps, very healthy. I have it wedged into a small crevice where it fits perfectly, and the polyps have formed a nice dome. But I do not think there is room for new polyps to grow from the sides due to the walls of the crevice. Will this prevent expansion, or will they eventually grow up above the existing polyps and expand over the sides? Should I try to raise to colony?