are you using a skimmer? any photo to show how the zoa and mushroom rot? quite curious what caused it.....
understand how you feel, just take it as a lesson and move on.....reading is one thing but on the other hand, i think real life experiences from snr reefers here are good to know.....: )
All the best and dont let this setback affect your day...new year coming...new life and new beginning. You dont have to spend very much in some nice corals, the trick is where to buy. : )