i did and i see them feeding its real cool, however if they get max 18inches or so u didnt asnwer wat kind of tank i culd keep them in, and all the fish i have in my 265 now with are bigger then 12" so the gulper cat wuld be fine i take it...i plan on gettin larger tanks in the near future so it wuld be fine...let me think about him, how many u have left? can redtails live with other catfish?