At first thot, I think sure no problem can glue it back the same spot. So I applied lots of glue gel on the broken joints. But alas…way to heavy to hold up. Next solution, I thinking to place in top of some intersection and glued and add epoxy to strengthen the joints. Ok, this is what I did…
Final scape look like this minus all the sick corals.
Still have a one or two acros having tiny bits of burnt tips but I leaving them as it is as my nano tank also have limited space and keep my fingers crossed to monitor if they can self recover by themselves.