i have looked in the gar section for tank mates so as long as hes at least the same size or bigger than the others should help, hes bigger now than what he was and he had no problems last time for 3 weeks, usally show up early on /but some times with age and size,and now he feeds really well it got to be worth a try i will get him to 12 inch first i reckon 1 more month will do it, hes looking fatter all the time ,i will let you know the progress if he not in the right enviroment and relaxed i will remove him ,but the others only seamed bothered about each other and not that often really,but most of them have all grown up from 2-3 inch fish ive had most of them for years now and it was a case of try diffrent ones to gether and getting rid of the agro ones, they all have diffrent temperments to a certin extent and they are all simlier size .