Last year I had problems with algae bloom when using a solar cover. So in trying to figure out why I bought a 50 PPM standard CYA solution so I could use it as a reference for knowing what a positive test looked like when testing my CYA (thinking my CYA level too high for my FC target). It did show me what a positive test was. My question is once I mix the test solution with the CYA reagent, can I store it in the bottle for future reference or do I need to make a fresh sample every time?
CYA testing and standard testing solution
- Thread starter Pool Amateur
- Start date
I can't say for certain how long a prepared sample will last, but my experience with testing and reagents would tell me to make up a new one.
Skimping or trying to save on the small relative cost of reagents simply isn't worth it in any case. The results they provide are worth a hundred times their price. This is especially true with some, like pH.
Skimping or trying to save on the small relative cost of reagents simply isn't worth it in any case. The results they provide are worth a hundred times their price. This is especially true with some, like pH.
The standard solution is used to calibrate your testing method. Mix it up and then test it for CYA. If you don't get 50, you're doing something wrong. Switch the way you hold it, hold it further away, move to a different spot, whatever it takes to get a consistent 50. Once you have that figured out, you're done. You don't need the solution anymore. Just test your pool water the same way month after month and year after year.
Yes basically that is what I was using it for, but in different light conditions I see the dot slightly more or less (seems more sunlight higher CYA reading), so I was using it as a reference, when pool sample matched appearance of reference we wold read. This is the hardest test for me because there is some subjectivity to it. Many times I get my wife to read the pool test and we come up with different #, that is when I bring out the reference and it helps. If I stare long enough I seem to many times see the dot so I just try and glance. However in "Extended test directions" it states "Continue pouring until all traces of the black dot at the bottom of the view tube completely disappear, even after you stare at it for several seconds". If I had a reference all the time I would be more accurate. While we are usually within 10 ppm from each other and maybe that is good enough. I now keep FC 3 ppm above target listed in chart when using solar cover, but this will lead to prematurely wearing out solar blanket. Just wondering how long I could save the reference, if at all?