Here is a reply I got from my friend Roy when he posted a video on FB of his tank, a very nice SPS tank at that. I asked him about his rusty angel but more importantly about his itch magnets, his regal and powder blue tangs.
"Nah, the rusty angel is fine with the corals, but hes a very territorial character. The regal gets the occasional spot but it never is a problem (touch wood)...and doesn't get worse. In fact the powder blue had a few spots when introduced, but they disappeared within a day or two and never returned."
Roy practices a similar approach to me when it comes to keeping fish, he never QTs and doesn't worry about disease.
Now, we hear a lot of people say such things like, put an itch magnet like a powder blue in your tank without QTing it first along with whatever is their poison of choice and I guarantee your tank will break out in itch, whitespot,even coronavirus.
Well there's Roys reply to my question about disease in his tank. We have known one another for over 30 years, he doesn't go on forums so much due to the expert haters who tell him he's nuts etc, where have we heard that kind of thing before or that our methods are madness and unworkable?