Just to clarify things. Are we talking about "green water" as in algae bloom or "green water" as in a white haze due to "new tank syndrome" (AKA bacteria bloom)? Two different things. Two different cures. George Booth in Ft. Collins, Colorado (booth at fii_com) Need Info? http://www.frii.com/~booth/AquaticConcepts.htm >> New Updates: 11/29/97 <<