For what it's worth, the home-testing kit we have for a fish tank shows 0 parts per million (ppm) in a test today, December 9, 2009, at 5:30 p.m. Eastern time.
I am a retired journalist and adjunct professor of journalism. I studied GIS, and I have blogged about cemeteries and land use, urban issues, and honey. All views expressed are those of the author alone.
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