Broken Heater

[Nemo]

I had my heater blow up on me last night. All of my corals look like crap, and my anenomies may be on the way out as well. The fish are unharmed, I am not sure how long the broken heater was pumping electricity into my tank. The tank went from 81 deg to 78 deg when I caught it. The heater has been replaced, and I have installed a ground rod into the sump with the heater.
I am mixing water for a water change, is there anything else I can do to help save what I have in my tank?


Robert