I have been using the test kit religiously for FC and PH almost daily. I am having trouble with the yellow colors on the FC but the PH is pretty good with the color changes, while the FC is very close between 2, 3, 4 (meaning that my eyesight can not tell the difference). Bright yellow of course.
This morning, about 15 minutes after pouring in 32 ounces of 12.5% liquid chlorine (maybe not enough time for the test to register), and with filter shut off, I also tested for CYA @ 40-50, CC @ O, TA @ 100, etc. If my CC was O and FC was 2.5 based on the extended test directions, does this testing give me a better or more accurate FC test results then the test kit with the 5 drops on each side?
Was the additional chlorine poured in the pool able to register on the test kit in this small amount of time? With the CYA @ 40, my minimum FC is 3 and Target is 5. I will perform an overnight test this evening to determine how much FC I am loosing daily (if any). I would like to bring my levels up at least to 4 ppm daily.
My guess is I was @ 2.5 this morning and after adding 32 ounces of 12.5 that this eventually raised my levels to 4.5 based on the calculator. Am I correct or missing something? Or should I have waited at least one hour with the filter running before I tested my levels again. I want to keep my levels between the recommended ranges daily.
This prompted me to post this after reading a post about the mineralizer system with such low FC levels and cloudy water.