In article , "Iain Miller"
writes:


CO2 does NOT affect KH.

There is a direct relationship between CO2, Ph & KH

If you add CO2 the PH will drop - the KH will stay constant


Maybe you mean GH? CO2 won't affect GH (mainly dependent on Ca+2 and Mg+2 if I
understand correctly).



Erica
http://members.aol.com/_ht_a/mitoem/mitoem/index.htm