I have a 5 inch naso tang in a 4 x 2 x 2 and have read that tank size stunts their growth? I love this fish. he or she has a really great relationship with me eating from my hand and would hate to give him/her up for adoption one day. Any opinions on that? Also what tangs would be suitable for that size tank? I have seen that kole tangs, mimics and powder blues dont grow as big as the others. Maybe yellow tang even.