I wouldn't know to be honest, I've never kept wild toad eggs. I remember keeping toad taddies as a kid and the majority died, minus the ones that did fully mature and that I released into the yard.

Sorry to be a buzz kill, just let me know how many die. Be pepared to shell out 50-60 bucks a week for fruit flies.

A 3 gallon bin won't be large enough for 100-300 tadpoles. Taddies do fine in semi-stagnet water, so make sure the pump isn't filtering to much out of the water, or moving around the water to much. I've never seen toads lay eggs in moving water.