I've dipped with all sorts of dips. They slowly close or shrink to nothing. Peroxide dipping has helped the most. They either get a hard algae on them that doesn't scrub off then stay closed or they just slowly shrink until gone. I can grow hammers, rbta, the few sps I have grow slowly, stylopora grow slow, my bird's-nest was growing but now has some green hard algae or something that has killed off a little bit, came from below where it gets no light. What sucks is I like zoas more than anything except maybe acans and my trumpet. My trumpet is always growing even with clowns hosting it and making it mad.