This morning I woke up and saw that my Hammer Coral fell onto an Acan frag. Now part of the Acan has a whitish grey film over some of it, I was wondering if there is anything I could do to save it?
I agree...use a powerhead or a turkey baster to blow off the effected tissue and then put the acan in an area where it will have some flow over it. It should recover, even if it takes a while.