I have always used Canadian nightcrawlers from Wal-Mart's fishing section as the staple food for my aro, rtc & clown knife. I occasionally gave them feeders, but usually just nightcrawlers. They loved them and all of 'em let me feed them by hand. My question is this: is this the best/easiest nutritious staple for a MF? Are there any potential problems with using this method of feeding?