Haines wrote: > > I have a test kit that measures KH & PH. I have a book that keeps > referring to total hardness. How do I determine that? > Get a kit that measures gH (GH?) for "general hardness." KH is carbonate, or temporary hardness. Wright - -- Wright Huntley, Fremont CA, USA (510) 494-8679 huntley@ix.netcom.com Quantum Electrodynamics: The dreams stuff is made of.