I know the feeling of the OP. Reefing is a wonderfully hobby but can also be very stressful. IMO coral QT can be difficult because you need to provide adequate light and if a new QT setup the result is significant algae growth. My process is to purchase from on-line sources who specialize in coral and maintain coral systems free of fish, inspect, use UV and other techniques to make sure the livestock is healthy and disease/pest free. Having said that, I also dip using the Billy Pipes method and when adding zoas use H2O2 per his recommendation.