I am having problems with my cya. I tested this morning and got a 50 I was outside in the sun with my back to the sun, I tested this afternoon again outside but there was no sun to much cloud coverage and came up with around a 30. I know the 50 was rite this morning cause I poured the solution back in the bottle and checked it about four times and it always came out to 50. Does the sun make that much of a difference on how the test reads?
cya ???????????
- Thread starter dennard
- Start date
Yep, there is a fine line between seeing and not seeing the black dot. The sun makes a big difference.
So I am rite to assume that my reading this morning of 50 tested in the sun would be the correct reading?
The test outside this morning is much more likely to correct. But you can't be 100% sure. Assume CYA is around 50 for now.
Thanks. So should I be using the chlorine levels that the pool calculator are telling me to use or the cya/chlorine chart numbers? I am new to this pool chemistry stuff but I feel like I am doing fairly OK. I am loosing around .5 to 1 ppm overnight and around 40 to 50 percent fc during the day and my pool gets between 12 to 14 hours of direct sun in a day. My water is clear and have had no cloudy water at all.
You can use #'s from the PoolCalculator or the CYA/Chlorine Chart. With 50 CYA, maintenance FC level is between 4 and 8, and never below 4.dennard said:
Shock level is between 16 (poolcalculator) and 20 (CYA/Chlorine Chart). Both work, just one is a little more aggressive.
I am really bad at telling when the dot disappears. So much so that I honestly have no idea what my CYA is- somewhere between 30-50.