See, when I got my two new mollies a little over a week ago, they seemed REALLY happy when I put them in the quarantine tank. But then a few hours after I put them in there, they were both just kinda laying on the bottom. Still alive and everything...I don't know why they did that. They only came up when I put food in. They did that for about the first 5 or so days. But then, the day that I put them in the 10 gallon, they seemed to be really happy again. I was worried that they weren't going to like the new tank. But they do.
I don't know why they like to lay on the bottom like that. I know that all of my other mollies did it too...but those ones died because of my inexperience...so...dunno