You're digging yourself a pretty deep grave here, dude and quickly wearing out your welcome. I would suggest you get about another year or two of successful reefkeeping under your belt before you go offering up advice, especially since you so recently had a major crash.
For starters, I added a fungicide to my tank due to wanting to add a refugium. It was a parameter error in the construction of an additional tank that caused the overall issue. Not a disease, not a parasite, not unstable parameters.
This does
not also somehow negate what Fenner, Calfo and others state regarding Cryptocaryon. There is scientific evidence to back what I state. You two are attempting to debate a point via a strawman argument with the undertones of argumentum ad hominem.
The experience in doing something wrong repeatedly does not somehow make you an expert nor does it make tested experiments irrelevant. This is what you both need to realize.
I can't remember what your particular issue was but with this guy he's making his anecdotal and erroneous statements based upon his "experience." We advance the field and the hobby with testable practice. He could have fifty years in the field and his practices would still be incorrect.
Ever do any research beyond undergrad work? Professors demand vertiable and reproduceable tests for this exact reason, to prevent anecdotes and pseudoscience from corrupting the scientific process.
If we reduce everything down to simple mathematics we get the following:
Cryptocaryon = parasite
Parasites need hosts.
Absence of hosts = no parasites
Copper kills Crypto
Copper is safe for fish
Copper is an effective treatment to get rid of Crypto
Cryptocaryon damages fish leaving them open to secondary infections,etc. It can also kill the fish
Cryptocaryon is highly infectious
There is a possibility that the fish you purchase from the store will have this disease.
What do you do next?
A. Put the fish in your display tank with other animals despite the first parameter?
B. Quarantine the fish?
This hobby is about 30% research and 70% experience. IMO, you need more a lot more experience and a ton more humility.
Scientific process:
If I do "x" it'll result in "y."
X produces Y and Z
X= No quarantine
Y= Happy fish
Z = Dead fish
Y is effective however notable abberant effects occurr resulting in high occurences of "Z"
If I do "w" instead of "x" will I reduce notable abberant effects from "Z" and increase overal occurences of "Y"
W = Quarantine
"W" validates the above hypothesis.
Do you now understand the correlation between experience and science? You both do the EXACT opposite of the learning process.
You two can happily go talk each other to death about how awesome your tanks are, flex your post count or whatever however don't espouse this opinionated and error ridden crap to other people to the point of having them risk their time, money and animal's lives.