ok i have no idea what to do. i just got a 620 gallon tank in which i plan to put my existing fish. 1, 14" oscar 1, 10" jd, and 3, 10" parrots. I also plan to add a few peacock bass at aroundt 15". I really would like to add one of these beautiful catfish to my tank. I will be buying it small around 4" and then growing it in a 150 until it is big enough to go into the 620. I am worried sick about waking up one day when the jd is gone from the tank! Any ideas on how to try to keep rtc or tsn on the small side like not power feeding? Dont suggest lima;s i dont like them. HElP GUYS PLEASE. Would the rtc even attack if he was smaller than the jd and got beat up buy him a few times would he learn his resepct? or would he be evil...