I'm going to throw in my 2 cents.
I feel that regardless of whether you choose to quarantine or not, it is irresponsible to advise someone else not to quarantine. Especially someone relatively new to the hobby. We should all at least pretend to have the best interest of our livestock at stake and suggesting that you shouldn't quarantine because it's difficult to do properly is really inappropriate.
I understand the debate between the stress of qt vs. a parasite that a healthy fish can fight, but the advice should be limited to ensuring success while in qt -not stating that it isn't necessary because "ich is everywhere". Anyone capable of logic, reason and critical thinking can be certain that ich is not everywhere. Perhaps it's not unreasonable to recommend against qt for a tang in a 10G tank, but let's be clear on what we are saying. If a 100G tank was available, this would not be so unreasonable?
Really, it's a question of cost. If we could afford a large and healthy qt tank, then for sure it's a good idea. Who would say otherwise? By advising against qt, we are really saying "don't worry about it - it costs too much money to set up a viable qt tank".
I think it's a question of experience.
Novice = I don’t quarantine
Intermediate = I don't quarantine but I know I should
Expert = I wouldn't put a fish in my tank without quarantine
In any event – none of the true experts – people who get paid to maintain public aquariums or who write the books we read would ever recommend against quarantine.
There are of course many experienced reef keepers that don't quarantine, but perhaps they aren't as experienced as they think they are when it comes to fish. Ask these same people if the qt their corals?
Personally, I’m at the Intermediate level but I am aspiring to be an “expert”.
- Brad