Wow. Sorry to hear about these losses
Had our solarensis fairy wrasse in a 20g loaded with extra LR from our 120g for two weeks while we cleaned, sterilized and refilled the 120g. Poor fish got totally freaked when all the rock was removed from the 20g and I was trying to net it. Luckily, it calmed down just prior to netting, and is now back safely in the 120g.