I would not feed on them, Try McDonalds.
Don't pay any attention to what Dad says......go to Burger King. :-)
Don't feed them, if its dark green and they're swimming on the bottom thats o.k. if there are leaves or anything like that blocking the light I would remove that, otherwise leave everything alone and they will feed off the gook. Yuk! I'm glad I'm not a tadpole.Love, MOM
Ummm.... I vote toss them out and watch them wiggle.Tab