Okay...here's an update. I found a post on another thread that helped me a bunch: circulate the water; then test. We took the cover off the pool yesterday, fired up the pump and let the water circulate for 24 hours. Huge difference. Here's the new set of numbers:
FC 1
CC .5
TC 1.5
ph 7.5
alk 100
cal 150
cya 60
My cya was about 80 at then end of the season last year. When I take into account the amount of water I drained off and the addition of rain/snow over the winter, a cya of 60 seems about right. I guess my 0 reading was a result of the cya "sinking" to the bottom of the pool over the winter (?)
By the way, the pool temp is 48 degrees. I know that's too cold for an accurate cya test, so I warmed the sample water by running the bottle under warm tap water until it was about 75. Is that acceptable or will warming it that way screw with the test results?
FC 1
CC .5
TC 1.5
ph 7.5
alk 100
cal 150
cya 60
My cya was about 80 at then end of the season last year. When I take into account the amount of water I drained off and the addition of rain/snow over the winter, a cya of 60 seems about right. I guess my 0 reading was a result of the cya "sinking" to the bottom of the pool over the winter (?)
By the way, the pool temp is 48 degrees. I know that's too cold for an accurate cya test, so I warmed the sample water by running the bottle under warm tap water until it was about 75. Is that acceptable or will warming it that way screw with the test results?