Water Test Tube Question

JPMorgan

Gold Supporter
May 22, 2018
685
Elmhurst, IL
Pool Size
60000
Surface
Plaster
Chlorine
Liquid Chlorine
What is the 11.5 mark used for on the Taylor water test tube? I have been filling the water to that mark to test for bromine in our indoor pool, counting each drop of reagent as 1 ppm bromine. Does that make sense?
 
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