Hi Scat/Craig: I would focus on two things right now...feed often (as much as they will eat in 5 minutes) and massive and frequent water change along with good siphoning of waste and leftovers. You need to put food in them, and keep the water as clean as possible...hard to do in a planted tank, but you can do it. Or you can transfer them into a barebottom for now, and grow them out, and then transfer them all back into this nice planted tank when they are fully grown. The only way to keep them growing and prevent stunting is clean water and lots of good high quality foods. Good luck! mike