Hammer and Frogspawn can be hard for some reefer to keep. When I had several tanks b4, one of the tank would start to melt away the frogspwan. Good thing I had several tanks around, it does fine in one of my tank, but it melt if put into another. You might wants to start a smaller tank to quarantine your corals if you buy/trade corals often. I fresh water dip many of my corals, but I don't think I have ever try to freshwater dip frogspawn and hammer corals.
Look at all those live rocks on the beach at Florida's state park!