Wow, that's horrible. For everything to go at once...what do you think caused it? Low / High temp? Did the sand get stirred up on the bottom (spike in nitrates / phosphates)?
Don't let it get you down. I've lost so much coral, but you keep plugging away. Set your tank up again, let it cycle (shouldn't take to long), and start filling it up.
I'll be happy to donate some frags to the restart. I know at least a few frags in your set up were from me
