Here's the latest...
As the Hippo was the only fish left and rather than absolutely turn the tank upside down trying to catch him and move him for treatment..I treated the tank with PraziPro...Within 3 days there was significant improvement...eyes clearing up...I dosed again on 4th day. Today, 8 days later he is looking perfect...no signs of flukes that were evident in the eyes...Appetite is unbelievable....
Also no negative effects with tank parameters or corals or snails.
I decided to start a QT anew by cycling. That too has been a week, ammonia still peaked with no nitrites yet, so I cannot quarantine any fish as of yet.. My question is: by treating the DT, when can new fish be added as I am not sure if the Tang was just treated for flukes and flukes may still exist in the tank?