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> ------------------------------
	Lance wrote:	

	>Calcium??  Is there a way to get it into the water without
hardening the

	It depends "which" hardening you are talking about. Calcium will
	the total hardness typically measured as GH. Calcium carbonate
	will increase both GH and the carbonate hardness (KH). I add Calcium
	for my plants in the form of Oyster Shell which does not contain any
	carbonates. Therefor I am increasing GH and not KH.