LOL - I know you know that the coral tanks are more stable so he puts the more expensive fish in there. And I 100% agree that keeping other tanks water out of yours is best I was just saying that if some water was to get in it would be better if it was from the coral tanks and not the fish only tanks. Anyway I digress, I am preaching to the choir

I also do not quarantine. I recommend people do if possible but I have had no luck with a QT tank. I tried (4) different times to set one up over the 12 years I did FOWLR and every single time the fish died in QT. I think it was the stability of the tank but as soon as I just acclimated them to the DT I never lost another fish. People get mad at me but I was tired of killing fish!! I am setting up a frag tank though and feel it will be much more stable. Can you quarantine fish in a FT?

Is that the majority recommendation about lights out when new fish added? I know fish use other senses but can not see in total darkness. IMO it seems scary to be dropped into a new place and be completely blind to what might jump out and eat you LOL. Do you go totally dark or some ambient lighting?