Hi all , had a bit of a ICH issue with my REGAL and Clownfish, I started dosing POLYPLAB daily for over 2 weeks, the ICH cleared totally on my Regal but unfortunately my clown passed.... now this morning my lovely Mata Tang has Black patches all over him and all other fish seem ice free... All parameters are good, double tripled check
please see photo, any thoughts / help... cant use copper and no QT

please see photo, any thoughts / help... cant use copper and no QT



