I just started a worm farm for fishing and was wondering what I should feed them. So far I've fed them some blended potato peels and carrot peels, and they seem to like eating those. If anyone has any suggestions, they would really help! Thanks

If I'm correct, they'll eat any fruit or vegetable you give them.  If potatoes and carrots are working, you should be fine to just keep doing that.

Spread your coffee grounds around your farm. They don't add much in nutritional value, but will keep your worms from getting thin skinned in the media (I'm assuming you're using some type of bedding material). Don't overdo the potatoes and carrots as decaying, if not kept in check, will ruin all your work.