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Old 12-07-2012, 06:01 AM   #14
Diana
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KH is 0 and GH is around 180
Add carbonates. Baking soda is fine. If you want a non-sodium carbonate look for the food grade of potassium bicarbonate. The garden grade (sold for fungicide) may have surfactants.

GH of 180 ppm suggests there is probably plenty of Ca and Mg.
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