Ahh, sorry to hear of you trouble, frustrating for sure...
Regarding your last post from 2/13 on "twitching," did you do as I suggested and make a partial water change? Be advised, copper has certain benefits but can reak havok with your bio filter, overdoses are common... as I said before, forget the Rock Beauty; it was a poor choice, doomed before you bought it... On the other hand, Clown loss is cause for concern; look CLOSELY at remaining specimens for any signs of ich/stress/damage, etc. dilution would be a good thing here... do you practice/maintain quarantine? Move any suspect animals there if possible. If you haven't in the past, please invest in a basic QT system and use it; essential to your long term success in the hobby.