If you have not seen the angler yet and not had a chance to assess his condition, I would recommend you do so prior to making a blanket statement about whether or not you are going to medicate him. You may not need to medicate him at all which would save you money! Plus medications are hard on them in general and if it's not necessary why bother? Typically when new fish arrive here, during the acclimation phase, we give them a 1 hour dip in ParaGuard right before they get put into QT. During QT we do not medicate unless one or more fishes in the tank are showing signs of disease. We have found a much greater success rate for doing that than medicating them "always" as a general rule.
The problem with meds is that some damage the nitrification process, some damage other things, and some do God knows what! I see little benefit in dealing with a nitrification cycling issue during medicating unless you absolutely have too. Nitrite poisoning is way more destructive to the fish than potentially getting a disease that they never had to begin with. I realize that there are cycling products out there like Stability and Fritz-zyme to help, but not all are perfect unfortunately and some don't work at all!
As with angler's due to his Warty nature, it will be essential you observe him closely under good light to make sure he is disease free. They are difficult to tell how they are doing but if you read up on them (Scott W. Michael's book Reef Fishes is an excellent source) you should do fine.
Good Luck, anglers are awesome!!!
