Yes you can! I actually found the old message saved in one of my Terraforum pm "archive" folders:
Quote from WildBill 6-08-2008 (hope he doesn't mind ): "The baby and smaller ceph pitchers get a Beta fish food called BetaBioGold. It's nearly perfect little 1/16th inch diameter spheres. It really helps, otherwise it seems like it takes FOREVER for them to grow. You see a growth spurt about a month later. The larger pitchers get Hikari brand Cichlid Staple tropical fish food pellets. It could probably be any brand but I was trying to find one that seemed to have better ingredients. I would feed one, maybe two fish food pellets in a trap every week or every two weeks. Some of the guys in the NECPS were talking about actually giving a very weak orchid fertilizer solution with an eyedropper right into the traps!"
He's also the one who recommended neem oil to me, so he pretty much changed my life.... at least in terms of cp cultivation