I purchased a velvet nudribranch to attack my planaria outbreak to be followed by a flatworm exit treatment and I put that darn thing into the tank and he immediately starts eating the flatworms and then while grazing he came upon a yuma - touched it sprang back violently turned into a ball and emitted a gold ink - alot of it. Since it was balled up it floated around the tank and hit a lot of corals and they all closed and slimed up. I immediately removed the nudi, and added lots of activated carbon and am hoping for the best. If things don't open up today I will do a significant water change. Anyone ever experience or hear of this?