<a href=showthread.php?s=&postid=9842970#post9842970 target=_blank>Originally posted</a> by JB NY
You want to at least be able to let the coral put down a good base. If you are going to have your tank up for a couple of years your corals are going to try to lay down at least a 3-4" base. Cutting into the base that has encrusted on the rock is much more of a pain that just breaking some branches off. more room you give your frags the better, IME.