If you mean the bucket you use for delivering the "waste" RO/DI's produce, I would say it's fine, this waste at the end is even drinkable water for humans, just something that ain't going to be used by your tank.
Also, the bucket in which the heater exploded, maybe you can really clean it out and rinse it well, modern heaters do not bring mercury which I would think it could be the major problem.
Hope to see what others have to say.