Recipe for 4dKH solution for the indicator: 1. Measure 3000 ml, or 2000 ml, or 1000 ml of distilled water or from the RO filter 2. Weigh 3.60 grams of NaHCO3 baking soda, add to 3000ml of water or 2.40 grams of NaHCO3 to 2000ml or 1.20 grams of NaHCO3 to 1000ml, etc. of water […]
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