Powder Blue Issues

[DSlater]

We have had a nice fat PBT about 4 to 5 inches long now for about 4 months now.
The issue is, that any slight inbalance or change in the tank will set off a cycle of ich. Water changes, adding new fish, cleaning, putting my hand in the tank to move coral...
When the ich breaks out he becomes an a** and put the run on our kole tang, cleaner wrasse, starry blenny, and anyone else that dares go near him. Ich also spreads to others in the tank but not nearly as bad.

I've been told by our LFS that this is just the case with the PBT's and as long as we keep him there will always be ich issues. That being said, I would love to hear some other opinions on this.

Other info: BPT was in the LFS for about a month before purchase with a cleaner wrass. We bought together and did not quarantine because I was more afraid of over handling and adding more stress. I have also started treating entire tank with Poyp Lab.

Any insight or opinions on this would be great. Thanks.