Just wanted to correct the chemistry, because it can be fatal to get it wrong. Do not mix household bleach with _ACIDS_, as this will liberate chlorine gas. Mixing bleach (sodium hypochlorite) with NaOH should be pretty uneventful because (acording to Dale, ex-chemist) household bleach is made\ by bubbling chlorine gas through NaOH solution. Don Jordan, ex-ex-chemist