used to mate, pretty easy in a coldwater setup, keep it dark though mate with lots of hiding places if it is a juvie, and lots of dither fish, i had some roach & crucians and random goldfish, that brought the out of themselves, made them feed more confidently.
pellets, earthworms, bloodworms.....etc. i used catfish pellets, but found vegetable based carp pellets were probably better.
good luck mate post pics ;-)