Well I posted on this about this almost 2 weeks ago, and never checked back. Now that I did I see someone is getting angry and being....well, uncivilized. Well, let me start with this: Have you ever kept aros? Because you just made the claim "they sleep at night." Every night, when I turn off my aro's lights, he shoots to the surface because of the darkness and is 2x as active as when the lights were on. Night is also the time I feed him, as his feeding response is much more acute. So, no; aro's don't "sleep at night". Also, do you keep rtc's? Basically everything I've heard of rtc's in the wild is this: they swallow large crustaceans whole and, surprisingly, eat fruit. Yes, they DO eat fish. But catfish are called "bottom-dwellers" for a reason. The fish they eat are on the BOTTOM. Do you think an rtc goes up to the surface to try to chase around an arowana? Yes, they are lunge-feeders. Meaning, they sit on the bottom, slowly cruising around, and lunge at any fish that comes by.
Also, let me point at this. The rtc in the picture looks about hm 5 feet? No, he's not going to get that big in a 55 gallon. HE'S BIGGER THEN THE 55 GALLON. Max size would be 2-2 1/2 feet. Also, it's hard to call someone else ignorant when your grammar is as it is.