[lynnvangsnes]

I think the main thing in tap water that worries aquarists is copper and sulfates. RO is the way to go unless your local municipality has good water. Ask them for a test, usually they are glad to get you one. Ya might have to be a chemist though to understand it...I'm not a chemist. Oh, yeah. One more thing; Bob Fenner is a very smart person, but he's not God; though he may think he is.