So I am very new to catfish as I have always been a poly guy myself. Recently however I have had this huge desire for an all south american tank, so I ditched all polys *tear* and got myself a megalodoras uranoscopus. I originally planned on getting more so that they could be more comfortable in a group and was totally okay with housing them in a monster tank in the future. However, I'm sad to say they just bore me. I thought polys were lazy but these guys barely move and that's if I can even find the bugger. So that brings me to my question. Can anyone suggest a predatory Catfish that can live in a pair or trio, doesn't exceed 24", and can handle itself with a wolf fish in the tank. I understand the risk of mixing predatory bottom dwellers but have been quite lucky with my projects so far.