The Planted Tank Forum - View Single Post - KH Standard / How to
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Old 02-15-2007, 01:13 PM   #2
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If you don't won't to make your own KH Standards or if you want a standard that's more accurate than the baking soda standard. You can go to the swap and trade forum or to Aqua Bid under "test kits" and buy one of several different KH Standards.

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