I just got a new 5 inch red to go with my other three. He is about a half to one inch bigger than the rest of them and as been in the tank for about 6 days. Unfortunetly, he seems very shy and anti-social. He refuses to explore the rest of the tank and stays hidden under a piece of driftwood, if anything comes near him he either ducks away, or nips at them and retreats. I thought after a few days he would be over this, but he's still in the same spot! I'm nervous that he is not eating. I'm also wondering if this may be the problem: when I bought him, he had been living in his own 10 gallon tank for as long as I had seen him in the store (about two months) Could he not be used to co habitating, and therefore never school with my existing reds? What do you guys think.. is he worth keeping, or should I give him to someone who can keep him in his own tank 
