It's hard to tell in the picture but are you sure it's frogspawn? It looks like bubble coral. Either way, try putting it right in some fairly strong water flow and let the current "wash" it. If it's frogspawn you can blast it pretty hard. If it's bubble coral, needs to be a gentler flow to avoid damaging it. This advise was given to me by my lfs
and it's worked for brown jelly disease and also unknown issues. For my corals that I can't pick up and move, I have a PH that I point at it for a while.