My CYA use to be about 70, I tested it today and it shows < 30. Is it possible it has dissipated, no rain to think of as I live in the desert. It's been about 2 years since I filled my pool and used stabilizer from big box store to bring it up to 70. I do top it off a lot during the last 2 summers.
Is it possible my R-0013 is old and not good anymore ? Or is it just naturally gone ? I use liquid 10% bleach to sanitize. Also maybe a gallon of acid every 2 weeks to keep it 7.2-7.6