Makes me wonder if he's not an X. Laevis, but he sure looks like one though. Perhaps he is OK because the frogs grew up together? I've raised my ACF with glass shrimp since they were small froglets and surprisingly I've had few casualties and they make great little tank left over food cleaners.

I have a small light tan pigmented ACF who doesn't want to grow either! He's very shy but seems to be getting a little bolder. I wish he'd catch up to the others!