CYA Correction factor for Total Alkalinity

[Kayakersmith]

In the booklet that came with my Taylor 2006C there is a section that advises applying a correction factor of .33-.35 to the measured TA value if there is adequate CYA present in the water. Currently my TA is reading 200, is it safe to consider my actual TA is 200 - (200 x .33), ie 134? Thanks, Mike

[chem geek]

The multiplier is for the CYA level, not the TA level that you were doing. So if your CYA is 50 ppm, for example, then your adjusted TA is 200 - (50 x .33) = 183.5. However, if you use The Pool Calculator (http://www.thepoolcalculator.com), then these calculations are done for you automatically and it will also account for salt and borates levels which the watergram does not do.

[Kayakersmith]

Thanks for the clarification!