Baking Soda.. How much?
Baking Soda (Sodium Bicarbonate) lowers pH, Washing Soda (Sodium Chloride) raises pH.
A balanced mix is 6:1 respectively.
One teaspoon per 25 gallons of water to raise dKh by one point.
Note: I don't recommend Washing Soda as good source of Sodium Chloride I have bought a PH Raiser for swimming pools at Canadin Tire. $3.99 for 2kg.
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