I have a serious case of Halimedia overgrowth. Started with 1 very small sprig on a piece of live rock. Now, the rock has become completely overgrown. Looks nice, but creates too much shade for my mushrooms & is even crowding one of my BTA's. I've used a razor blade & trimmed some of it back to the rock, and want to know how best to start it growing in another tank. Attach it to a piece of LR rubble with rubber bands like a xenia? Stick it in the sand bed? What will be best?