hey guys i hav 2 bgk in a 50g tank.... they are 5 inches... they seem to get along now but when shuld i move one to another tank?(what size)... i had to buy 2 of them becoz the guy who gav me was willing to sell both or none, coz it was eatin his small fishes... i m luking to giv one, bt no buyers so far... dont kno wt to do..