I seem to be using a lot of chlorine. The pool has been shocked, stabilized, and my readings are:
CYA - 50
pH - 7.6
CA - 270
Tot AL - 70
pool volume - 18,500 gal (in ground plaster)
Taylor K-2006 test kit
Every evening I run the chlorine to 5 ppm. By the next afternoon I am down to 2.5 ppm. I am using about 70 oz of 8.25% bleach every day. That will run me about $50/month, quite a bit more $$ than when I was using pool store trichlor or dichlor pucks (if you ignore the cost of changing out the water every so often).
If I increase the CYA to, say, 70, theory says I will use less chlorine but I will have to go to 5 ppm chlorine to have the same oxidation effect. So, here is my question. Will I really save on chlorine? I'm losing about 50% per day now. What percent will I lose by going to a CYA level of 70? That will allow me to calculate what any savings might be.