Ok, here's my process....probably overkill now that read what everyone else does.
1- frag goes into container with store water floating in the QT. (Temp acclimation)
2- every 5 minutes or so 100 ml of QT water goes into container
3 - initial water volume in container is doubled then half is emptied.
4- repeat steps 2 and 3 three times.
5- during the temp acclimation and parameter matching process the frag is inspected visually for any pests.
6-bayer dip is prepared in a separate container that is only for dip, using QT water.
7- coral is dipped for 10 minutes
8- coral is rinsed in 2 separate containers of QT water
9- frag plug is removed if doing so won't significantly harm the coral.
10- new frag plug attached if desired
11- into QT for 2 months minimum.
12- randomly dip again if anything looks weird.
This is the most thorough process I could come up with. I don't trust any source but myself to be pest free when things go from QT to frag tank.
I figure if i do get a pest I did everything I could to prevent it so I won't be as upset.
I lost 1 frag since I started doing this process (1 year), but it came on a 2 hr drive home from reefapalooza, which involved multiple tank transfers.
In my mind I would much rather lose an occasional frag in this process than introduce something that can wipe them all out.
I once had monti eating nudis in a display and I never want to experience that again.