To be clear I’m not anti-QT. Quarantining is a core component in aquarium husbandry and
@DancingShark frames the conversation and trade offs very well.
Rather, I’m skeptical of claims that ich has 100% never been in a system. Is there a test that can detect it in its dormant state? Or is this based entirely on its lack of observable presence? Have folks never had an ich outbreak in their tank perhaps due to rigorous conditioning they’ve put this fish through in QT? Or because the tank is well maintained in the first place? You see how this is a chicken or the egg sort of conversation?
I’ve had ich in my current system once in the last 3 1/2 years. As I mentioned earlier in the thread it was with the introduction of my Achilles. It stayed with him, no one else got it, and it abated after a week or so. Before that could I have claimed my tank was ich free? 3 1/2 Years is a large sample size.
So, is there a test to determine the absence of dormant ich in your tank?
What does the QT process look like, from building the system and adding rock, ceto etc, to stocking fish, coral and inverts?
Note, I see someone added a link about QTing inverts. Gonna have a look at that.