A friend just got some samples of some worm feed called WORM GLO.I tested it on some nitecrawlers and they turned a pretty bright yellow color.I didn't get to use them ,so after about a week they slowly started fadeing back to their normal color.I have heard that the stuff works and gets more bites,has anyone out there tried it? I just ordered 1 1/2 # so hope I get some good feedback from youall ;< Bob