So i have a std 55 setup, 2 severums, 2 carpintis, BP, and 2 F1 festae 1 at 3" the other at 6". today i took out the smaller one to put in his own little 29g tank. will this help the little guy grow better since he is not competing for food? in the big tank the big festae ate it all. has anyone grown a fish out and reintroduced into the same tank? any problems that occur with this?