Pool store results vs my ps223 results!

[scarywoody]

Yeah they are little square plastic vials he squirts water into. Then a machine reads the results. The Ph has me confused too...maybe i'll go buy some strips and see what they think.

[waterbear]

LaMotte Waterlink...same as I use as work. If it is done right it is extremely accurate. The FC is supposed to be read as soon as the water is put in and the vial is turned over 3 times. The other tests are read in order but proper time for test development is needed or the results might be low. I have checked on my own pool the LaMotte testing against Taylor's and Ben's kits and have gottend basically the same results within normal testing variances. As I have stated in other posts testing is only as good as the person doing it and I would trust most of the members in this forum to test my pool before I would trust most pool stores! Strips are not going tell you much of anything...don't waste your money! If your chlorine was above 10 ppm that would cause the LaMotte test to read high on pH...all pH tests have interferance from high chlorine levels and LaMotte's is only corrected up to 10 ppm chlorine for the pH. I believe that Taylor's and Ben's is corrected to 15 ppm. That could explain the problem with the pH results.

[scarywoody]

ok I'm losing faith in the pool store. Since my last alk reading of 88 I have added nothing to the pool. Today they tested my water and said the alk was 126. My ps223 still says 120, soooo I'm going to start trusting my ps223 more.