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Old 03-19-2010, 04:53 PM   #6 (permalink)
Diana K
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Default Re: Understanding GH & TDS & Hardness

There are not many plants that will thrive when the water is so low in minerals as to measure just 100 ppm TDS. Most plants that we keep in aquariums come from somewhat harder water than that, or, even if they come from soft water, they can thrive in harder water just fine.
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