Here are a couple of posts I made in the past of my experince with zoas Wes, hth any detailed questions let us know. Later
I have been allowing my zoas a chance to attach to an adjacent rock. Usually takes a couple of weeks. Then cut or pull away the main colony. I have noticed that the new ââ"šÂ¬Ã…"œfragââ"šÂ¬Ã‚ with this procedure will grow and spread faster than the glue method. I use the glue method only if I get a loose one floating around. Water quality and lighting helps. I think water flow and feeding, not over feeding is the key.
Scrap it off with the exacto knife. Try to get some rock as it is easy to scrape off. I have found thru trial and error not to use a lot of glue. I like using regular old super glue non-gel. Put a good dab in the middle where you are going to place them try not to get the glue on the edge of the mat as this will slow down the growing "spreading" process. Take your time as zoas are hardy once they close up, and do a fresh water RO/DI dip to get the crud out between the polyps. I have noticed better results with these tips.