I do a lot of fragging and the bowl of water the frags are in cools down quite a lot, also the frags sit out in the open while the glue hardens and I never have a problem as there is usually polyp extension the next day. corals are much hardier than we give them credit for. Temp acclimation really has nothing to do with it. You need to do some kinda drip so that you have a pH and SG acclimation, those are the areas that will cause problems not temperature. I float the bags, (so I guess i'm temp acclimating as well) then add some tank water to the bag, give it 10 minutes and then some more water and thats it. Granted some corals I simply toss in the tank, but some of the rarer exotic items, I take no chances with