Brick Fish House;980844 wrote: Now you've done it!
This is one of those topics that gets a whole bunch of people into a hot controversy argument.
First and foremost, this is a hobby with a lot of information and a lot of opinions, each based on each person's research, hearsay, and/or experience.
...and most have their own merit. Some fish need special acclimation practices, and at the same time, others have gone straight into tanks with no ill effects (I don't recommend this).
In my experience, here's what has worked for me:
Generally speaking, I like to qt for over two weeks. It allows parasite eggs to hatch, spores to do their things, and bugs to die. Does it always happen? No. But I want to do everything I can before adding them to a display.
If I see flukes, I freshwater dip. If I see ich, I cupramine. If I see something, I treat. Otherwise, I leave it alone.
However, most fish I qt are in there for about three weeks to a month because there is something else I want to accomplish before adding them to the display. I want to make sure that they are becoming fat and happy. I don't want to put a fish into the display without giving them the strength to put up with the domination/pecking order routine. I want the fish to be relatively strong so that it doesn't get completely stressed out after going in.
Then again, that's just my opinion. I could be wrong.