They grow and spread quickly in my tank. They are planted, mostly, in the crevices of my rocks - which are stacked, large, and basically impossible to remove. It would be impossible to cut most of them off with a razor blade. There are areas that need "pruning" and I need to get rid of them (no desire to frag in this case). They are encroaching on my stylophlora and other more desirable corals. What are the best options to keep them at bay? I've seen a few recommendations for kalk paste or even a Mojano wand. By the way, if there's anyone in the Oakland area that would like to harvest some, I'd be happy to donate some frags for free. I have several different colors.