I'm sure I'll regret this. I’m new, and I’m not convinced either way, regarding quarantine tanks and practices.
Several people whom I respect highly as proven, accomplished and wise aquarists do not quarantine.
Consider the possibility that quarantine is an easy band wagon to jump on. Consider the possibility that well-meaning hobbyists may profess that they quarantine, but in truth do not; too embarrassed or fearful of being harangued by the pretentious to confess it.
Consider the journey most fish at your LFS have been on; “collected†from its home in the sea, or raised by a breeder, residing in some distribution point, then onto a wholesaler or retailer or two, all the while being “treated†with chemicals and isolated in purposefully unnatural environments. I really wonder if one more small isolated holding tank and a chemical bath is really the best thing for any fish at the end that journey.
Likewise, if the fish I’m buying is indeed ill or infected, and only appears healthy, there may indeed be some risk to my system if I introduce without quarantine, but, frankly, I have taken that chance and will do so again, convinced, at least at this point, it’s the best thing for it, and trusting my intuition.
I suspect there is no shortage of parasites, fungus, viruses and bacteria in any display tank, and that any sufficiently weakened fish is susceptible to illness and death. Heck, seemingly healthy fish get sick and die in truly healthy systems.
Sometimes I wonder if the whole argument for quarantine is not bolstered by some kind of weird self-supporting logic and testimony that says “well, I quarantined my fish and it died so I saved my whole tankâ€, or, “I didn’t quarantine a fish and my whole tank died, so quarantine would have saved them allâ€. Neither experience are definitively supportive of, or sufficient justification for, quarantining fish. In fact, on the contrary. The fish you bought and soaked in medications may have indeed died because it was in quarantine in the first place, and it was one “quarantine†too much. Your whole display tank may have died not because you didn’t quarantine a fish, but because your husbandry and/or discernment stinks, and one more fish was the straw that broke the camel’s back.
Buy your fish and leave them be at the LFS while you watch them. Better yet, shop in your LFS’s quarantine, and time your purchases after having already watched the fish over a period of time. Acclimate to temperature, and turn your lights off when adding new fish and thereby reduce stress. Keep your tank as healthy as you possibly can, such that the best thing you can do for any fish is put it in your display. But by all means, lighten up about quarantine.
Ostracize me if you will, chasten me, whatever; but let's not consider something so subjective as quarantine as absolute truth and necessity.
(Am I overthinking this, or underthinking it? LOL)