My 8 inch redtail cat's been eating real good. he's eaten so far 2 3in african cichlids, 2 5in pbass, and 1 6in silver arowana. now i got to leave the lights on so the others can see him at night.
sorry to hear that bro. i think you have to consider transferring him immediately on another tank or else he'll continue to devour all his tankmates if they're small enough to be eaten.
when my RTC was 10" he ate my red pike now that he is 23" he has not ate any mor of my fish I feed him a lot of market shrimp,squid he is a true monster.