What Kind Of Care Do Tadpoles Need And What Do They Eat?
Keep tadpoles, as well as frog eggs, in water at all times. Change half the volume of water no more than once a week.
The best diet is probably baby cereal that has a high protein content, fresh green leafy vegetables, and bits of egg yolk. Provide a rock island when the legs of the tadpoles appear.
A 5-gallon (19 liters) tank is sufficient for a half dozen tadpoles. When they mature (lose their tails and grow legs) they should be released in a pond or on the shore of a lake.
Source: Dolensek, Emil P. A Practical Guide to Impractical Pets, pp. 67-68.