On Fri, 1 May 1998 16:43:27 +0100 (British Summer Time) Ken Laidlaw K.Laidlaw@roe.ac.uk> writes: I notice David Soares uses the above chemical to lower pH. Anyone any idea where to buy this and does it have a common name (e.g. mag sulphate = Epsom salts)? Also are it's effects permanent and are there any side-effects? Thanks, Ken. Try Baking Soda at the grocery store. Works great but regulate its use in small doses. Phil Ryti