venymae
Aquarium Advice Addict
So the question came up about how many people here use a quarantine tank? If you don't what do you do to prevent new disease from entering your aquarium with new fish?
10 gallon QT with a small layer of gravel and plastic plants and decoration for hiding spots that are easy to sterilize. I keep new fish for 4 weeks minimum. I've had Ich appear after 10 days, and had a mass die off for unknown reasons. In both cases I was glad I didn't introduce the new arrivals to my display tanks.
My eyesight isn't so good that I can see microscopic parasites and bacterium, nor do I believe that fish have the emotional capacity to be "depressed", so I advocate quarantining new fish and visibly sick fish.
I'm not for QT'ing new arrivals as I am one of those who thinks it is more stressful for the fish. Especially when coming from a tank full of mates to a bare bottom dark lonely tank with minimum decor only to be moved again.
It might just be my QT but it is fairly depressing and just depresses the immune system further. I guess if the fish are healthy they would handle a QT tank without any problems. It's a tough one.
Like the op I try to pick the best looking fish and have a QT for IF fish become sick. I will isolate them and treat mainly due to cost.
The chances are that once fish acclimatise to your clean water they are much more likely to become free of disease. Parasites are different but a quick salt dip usually sort those out.
I think you're right. If your QT is not great, it's questionable if it's a good idea. I guess the key is that a GOOD QT is what's needed. Fully cycled, same amount of plants etc....as the main tank.