We are trying to change over to the bbb method and I have read about the Liquidator. Could anyone tell me exactly how this works? Does it only work with liquid chlorine or can you use bleach in it? I assume there is some sort of container to fill which releases the liquid. If this is the case, how long does each refill last? Does anyone know if they are available in Italy, or, if not, a company that would post to Europe?