I recently saw where tftestkits offered a standard 50 ppm reagent R-7065. I thought I'd try to test my CYA results and I'm confused. I received the R-7065 and a brand new bottle of R-0013 and proceeded with the test. I did the test 4 times and came with a CYA of 30. I did it again with a new sample 4 more times and got the same results. I checked it the kitchen with florescent lights, without lights, outside in the shade, outside with the sun at my back. I even, without looking for the black dot, filled the view tube to the 50 line, and looked for the dot. I could clearly see it, with a glance, staring at, even with one eye closed, etc. Do I have super human vision, or am I missing something? My actual sample from my pool reads CYA of 40.
I'm running my SWG longer than normal and my FC seems to hover around 2.5. I feel like the sun is eating it up because my CYA is too low. I know with SWG I should target 70, but these readings have me concerned that I really don't know what my CYA is. Any suggestions? ?
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Water is spakling crystal clear BTW, just want to keep it that way...