ALSO.....
My feeder fish are up to 4" long and they are both identical in color and size. I am pretty sure that they are male and female, but i haven't seen any eggs. Anyway, they chase each other in circles and the female is eating the male's tail fins and top fin. He's not sick (yet) but he's starting to look a little shabby. SHould I put baby grass down for them to lay eggs, or what? This has been going on for a couple of months now; its fun to watch.