I should be running close to 4 ppm with a CYA of close to 50. If I lose 50% each day and must replace, it will cost me about $54 per month just in chlorine costs, according to the numbers I am getting from the pool calculator. (I can buy 3 119 oz jugs of 8.5% chlorine at a big box store for $8.50, and if my arithmetic is correct, that comes out to 2.38 cents per oz.). That seems high. But, I don't believe the pool calculator. When I shocked from 0 ppm, I put the calculated amount in the pool to give me 20 ppm. I actually got 33 ppm, so something is wrong. Either my pool is not 25,000 gallons as I was told, or something is wacko.
I just had to pay for almost a whole pool of water because my CYA was too high. That's the second dump in 6 months, so I leery of adding trichlor or dichlor to up the CYA. Anyway, that will increase the amount of chlorine I have to add to the pool to be effective. There must be a discussion about this somewhere on the forum.
I may just experiment with putting in measured trial amounts of bleach and see what levels I get in the pool. I suppose there is a way to back calculate the pool volume doing this.