finally last night i put him with electric catfish, polypterus endlicheri, and common pleco...
in the morning i saw the catfish tail has been severed, so i moved him to the pond, the dorsal fin of the pleco too....i just put some feeder fishes since i must go to work, which is quickly being eaten....hope everything is ok when i get back from work....
contrary to what i've read, the palembang is very very active tho....