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1 Fill test tube with sample to the 10 ml mark.
2 Add one Alkaphot tablet, crush and mix until all of the particles have
3 Stand for one minute then remix.
4 Select Phot 2 on Photometer.
5 Take Photometer reading in usual manner (see Photometer instructions).
6 The result is displayed as mg/l CaCO3.
Note: To convert Total Alkalinity as CaCO3 to Total Alkalinity as HCO3
multiply result by 1.22.