I don't know if it's still on the market, but we have a little bottle of stuff called "De-Chlor" that we use to remove chlorine when we feel the need. I think it's plain old sodium thiosulphate. One drop per gallon. George Booth in Ft. Collins, Colorado (booth at fii_com) Need Info? http://www.frii.com/~booth/AquaticConcepts.htm >> New Updates: 11/29/97 <<