I've had them for about a week now. But 1 of them I've had for 2 months or more.
It's a 20 gallon tank and temperature is 78 F.
It seems like they are always hiding and I'm not quite sure if they hide as soon as they see me or if they are already hiding. They are the only ones in the tank.
I do have 2 cats that I know like to watch the fish, maybe they have something to deal with this? Other than that they are in a pretty quiet room. Nobody really goes in there except for me and the cats. I have sat there without moving watching the tank but they still hide. Occasionaly one will zip out from the hiding spot but then it will hide again.

Here's what the tank looks like to give you an idea. They like to hide in the temple thing mostly and sometimes in the plants.