30,000 vinyl pool.
Pool store says I have 10 ppm of cya, I added 8 lbs of stabilizer at open (6 weeks ago), and have been using trichlor to get my cya level to around 40 around 15 lbs this year. I also use bleach to shock at night.
Why would my level be 10 ppm of cya after adding that much stabilizer?
Am I getting "pool stored"? And yes, I know I need a better test kit other than the strips.
Thanks in advance.