Hi all,

I was wanting to know, when is the best time to test water. In relation to when pump was last used. I run my pump on average 4-6 hrs a day, sometimes longer. Is it best to test before, during, or after pump has been on.

Yesterday, pump did not get turned on. Today before I turned pump on I tested water. Water is crystal clear but I got some not so good test results and was wondering if maybe the test results could be flawed, because I was testing water that had been stagnant for a day. I have a 21K gallon, 16x32, IG, Vinyl pool. Sand filter with Haywad 1hp pump.



Test results were:

FC - .23 ppm
TC - .98 ppm
CC - .75 ppm
PH - 8.1
AK - 207 ppm
CYA- 61 ppm

thanks