I didn't tell YOU to accept anything or do anything in your tank, man.
I reported what I've done and information on the problem.
You sound uneducated from the start of this thread. Which is my point. So you're calling the kettle black which is the other point.
https://edis.ifas.ufl.edu/fa164
"Immunity
Fish that survive a Cryptocaryon infection develop immunity, which can prevent significant disease for up to 6 months (Burgess 1992; Burgess and Matthews 1995). However, these survivors may act as carriers and provide a reservoir for future outbreaks (Colorni and Burgess 1997).
"Spontaneous Generation," theory = "act as carriers and provide a reservoir for future outbreaks" .
So you CAN buy a fish with no SIGNS of Crypto and it CAN create an outbreak if conditions in aquarium cause stress.
6 month quarantine on fish sounds fun. Hope you have an amazing quarantine tank. 6 months of that could kill the fish in itself.
So i'll take the experts whose articles I cited as experts and not you.