I used just plain old sweet corn from a can on a hair rig and within 20 minutes the bell went off and I landed my first carp yesterday. I wasn't sure on buying some store bought boilies at first so the guy said just get some sweet corn and try it out. It'll still work and he was right. Didn't think much about the species before but after landing one I appreciate the fight it offers.
Very fun to catch and release!