Something funny happened the other day. I was doing quite massive tank maintenance, so took most of the deco out. I tend to just put the dripping stuff on a plastic bag on the floor. When I was done, I put the deco back in and didnt' think more of it. Turns out that one of the really young molly fry had hitched a ride on the decor, and had dropped in one of the folds of the plastic bag. The next day, when I went to tidy away the plastic bag, I saw something squirming. Ewwww. It was that little fry. I dropped him back in the water and he just happily swam away.