ok. started my 75 gal in november. finished cycling. all paramiters are great. i bought the first addition last week, a yellow tang. unfortunatley i dont have a QT so i acclimated him for about an hour & dropped him in. within the first hour i noticed him flickering around. the next day was getting worse. still eating well. after a couple days i found out it was flukes. i was able to recover the tang & returned him to the LFS for treatment in the hospital tank. i did a FWD before i took him & found a ton of flukes falling off. question, how long should i leave the tank w/out livestock? how long can the flukes live in the tank without a host? thanks for your time. and yes, after this i will be buying a QT.