Sorry for your loss. LMK when you have your tank back up, I should have a frag or two for you.
Also, thanks for posting this. I had seen people talk about using GFCIs, but you always think that it would never happen. Your tragedy made up my mind, next task on setting up my new tank, install GFCI. Just looked a DIY page and for the amount of work required to install one, no question it is worth it. Again, sorry that this happened to you.