i just picked up a new 4 inch silver aro and put him in a 20g growout. my gar is just about 12inches now. im thinking he would find the aro as a nice snack but he is in the tank with little 3 inch clown loaches, a 4ish inch pictus and some kissing gouramis. he shows zero aggression towards these fish so what do you guys think? should i let the aro grow alittle bit first?