02-21-2012, 02:43 PM
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Most of us don't have hardness test kits either. But getting something like the API master kit is a really good idea; it's practically mandatory when cycling a tank. For water hardness you can check your local water treatment plant. They publish water quality reports yearly, and most of the time they include hardness and pH.
I know livebearers like guppies and platys do well in hard water. If I remember correctly rainbow fish do, too. You've got some pretty and colorful options. FWHardness
This seems like a pretty good article that points out a lot of hard water fish; I found it while looking for hard water fish in case I move. (I can't vouch for everything this guy says, tho.) I have soft water, so I have no experience with hard water fish. But I'm sure other members here do.