Cory writes: > My water is very soft too- for the plants I add 1 measured teaspoon each of > calcium chloride and sodium bicarbonate per 20 gallons of water (I also use > Co2 injection)- my water comes out of the tap at less than one degree german > hardness for both the carbonate and general hardness and pH 6.5. After > adding the baking soda and CaCl the water is at 4 degrees general hardness > and 3 carbonate hardness. The water chem. is very stable for me with this > setup- with Co2 the pH stays at 6.5. As I understand it, using crushed dolomite would do the same thing without increasing the content of Sodium Chloride in the tank (which is esentially what you get- Sodium Chloride and Calcium carbonate). Bob Dixon ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@majordomo.pobox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@majordomo.pobox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!