I bought a pacu from a guys house last year around June and put it in one of my tanks. It was about 3 inches then and now fast forward a year and he is about 3.5-4 inches... I thought he was going to get huge but he just isn't growing. We feed him everyday and since he hasn't grown we have since then just stuck him in a 20 gallon tank. Any ideas why he wouldn't be growing?
