Beverage Doctor pH Buffer Solution Powder - 3 Pack (4.00/6.86/9.18)

Use buffer solutions to keep your pH meter calibrated. These are the same 3 solution powders that are included with the Beverage Doctor pen-style pH meter.

Directions:

Completely empty the powder into a clean glass jar

Add 8.5 oz of deinoized water

Stir until the powder has completely dissolved