You and i have about the same tank only my cat fish is a stergeon cat, i have 2 red tail barracudas, 2 payara, 3 datnoids, 2 peacock bass, 2 motoro rays and a green arrowana. How big is your Red tail min are about 6" right now but wow can they eat. Believe it or not they are the only thing i can't get to eat frozen krill in my tank.