Get your water parameters to match mine, for a start, and make them stay there, which they will do, once achieved, so long as the magnesium stays above 1200. Decent but not too strong lighting. And beware the really large fluffy ones, which may be toxic palythoas. Look those up and also ask your dealer. Be sure what you acquire are really zoas. Also limit your number of snails, which are good at shoving frags around. Microhermits are much ore polite.