i too have heard that cloumbian sharks are a brackish water fish but he has done quite well in our aquarium. hes like 6" long and has not ate any fish yet . the featherfin is apx 4" and i know he would be safe with the shark he's in his own little world (shark is mentaly off). Don't know how this will work but this is whiskers at the top of the tank where he usually hangs out. there were some flakes on top of water for him to eat but this is his usual spot.
Then i was thinking that maybe move fish from 110 gal and make it a discus tank that way i can keep 180 open for bigger fish and maybe a varity. your pics are getting me hooked fuzz. darn you .
Then i was thinking that maybe move fish from 110 gal and make it a discus tank that way i can keep 180 open for bigger fish and maybe a varity. your pics are getting me hooked fuzz. darn you .