One of the easiest ways of attaching and moving frags around also works well for colonies. Mount short lengths of acrylic rod to the bottom of your coral and drill holes in your liverock to match the diameter of the acrylic rod. Small frags can just be super glued to the acrylic rod while larger colonies may need to have a hole drilled into the bottom of them and then rod glued into that hole for additional strength.
The branching frogspawn would be a little trickier. I've always just wedged mine into a gap between several rocks. But if you want to stick yours to the face of one you could drill a hole, insert a rod and then zip tie the frogspawn to the rod.
Why is the liverock in your tank dissolving at such an alarming rate? Is your pH extremely low?
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