Test kit results way off from what pool store says

kikipunx

Member
May 9, 2020
13
Lake Mary, FL
Yesterday's results were better, somewhat. Got the PH down to 7.6, TA down to 200. I tried the CH test method of adding 5 drops of the reagent into the sample water 1st for metal ion interference, then proceeded with test. But I gave up after 50 drops & it was still pink! I will try the method today of diluting with distilled water. My fill water CH results are 875, but I didn't test TA or PH of it. I can do that though today.
 

kikipunx

Member
May 9, 2020
13
Lake Mary, FL
Yesterday I tried the CH test method of diluting with distilled water. I did 5mL of distilled, 5 mL of pool water to total 10 mL. Still got astronomically high results. I decided to do a hybrid method, but not sure if the results are trustworthy since it's a mix of 2 different methods. I did the dilution method, & also added 5 reagent drops at the start to get rid of metal ion interference. Don't know if that's ok or not! But it only took 8 drops to turn blue, plus the 5 at the beginning.

My PH remained at 7.6 & TA dropped to 170.