Don't be so sure about it being a tem. I don't think it is personally. Remember tongue's post 'ID please?' awhile back? I think that fish is just stressed.
As for growth... I have the same problem. It is just a matter of who is a more aggressive eater and gets more food. One of mine is 4x bigger than its sibling and they both were 1-1.5" when I got them. I had to separate them in fear of the big one eating the little one
As for growth... I have the same problem. It is just a matter of who is a more aggressive eater and gets more food. One of mine is 4x bigger than its sibling and they both were 1-1.5" when I got them. I had to separate them in fear of the big one eating the little one