Questions

[gfritz1]

It was above 100 last year when did a partial drain and then a super shock for 24hrs at above 20 .This was when I had a zero chlorine reading and had followed the pool store adding stuff. Since doing that last year and getting a reading and being able to hold that reading day in day out including winter I have been 100% on bleach . I learned the hard way that all the stabilized tabs do is eventually get you into a problem . Using only bleach I assume over time my CYA will drop as water is lost though daily sun exposure and people splashing and refilled with rain water .I know it will take time. So you saying if I look at best guess chart I should be 5-10 which means then need to raise to 7.5 and hopefully then can catch each day so does not dip below 5. What is normal in chorine lost per day realizing a lot of things impact that ? Im seeing maybe 2-3 ppm adding the bleach in the morning. MY CC is basically zero
Thanks again for all the help and answers

[Watermom]

You want to raise the chlorine high enough so that when you test in the evening, it is not below 5. Try going to 7.5 and if you still drop lower than 5, try 8, etc. Actually, with a CYA at 90, you might add enough bleach to take the chlorine to 10ppm and then you might not need to dose it for a couple of days. That is one advantage of having a higher CYA pool ---- less frequent additions of bleach. You just have to learn how your pool behaves. By the way, it is best to add bleach in the evenings when the sun is off the pool rather than in the mornings.