I have been struggling with CYA for 2 years. It seems no matter how much I put into the pool I am "ALWAYS" around 40-50PPM. Perhaps I am just stupid and can't get this test done correctly but it's the most unforgiving test I think we can run for our pools. My largest issue is with the test itself. The label on the bottle I have is on slightly crooked, so I have to adapt a little, also, when filling the test solution to the top of the bottle (where it slopes towards the lid, I find it impossible to get it level there, it's either over or under. Then looking for the black dot to disappear there is so much subjectivity here, "it will not completely disappear, "don't look directly at the dot", " it will be slightly grey", etc, etc. This is a bit ridiculous, I was about 40ppm, I added liquid CYA, to bring it up 30 PPM, tested a week or two later, still around 50ppm. Just added more liquid CYA, 20ppm, tested a week later and I am still in the 50ppm range. For the sake of history, I used the dry CYA last year and the year before, same result.
So, can somebody tell me the exact amounts of pool water / cya solution I need to use in order to complete this test, I am going to find a more precise way to measure the water/chems. as this bottle method has ALOT to be desired. I see sooooo many similar threads I am amazed there are not some videos showing the exact look of the vanishing black dot.
So, can somebody tell me the exact amounts of pool water / cya solution I need to use in order to complete this test, I am going to find a more precise way to measure the water/chems. as this bottle method has ALOT to be desired. I see sooooo many similar threads I am amazed there are not some videos showing the exact look of the vanishing black dot.