Sorry to hear the bad news Steve 
 
Those where some really amazing monti caps that you had!
As for temperature, I also had a bad spell of "boiling water syndrome"
a few weeks ago. I had the fans a blow'n and even used cubes in the sump for a few days to help keep things cool. 
I lost one mother colony of Digitata, so I'm thinking that maybe this species is delicate to temperature swings. Everything else was a little stressed, but things are back to norm now. I can relate somewhat on the heat situation though, as my tank hit 89 for 3 days straight.
Once again, sorry for the loss. 
 
On a brighter note though- I guess you can get some monti cap frags back from every islander and a lot of us mainlanders too 
