My chlorine consumption in Central PA has been running about 70 oz (6%) per day. I have maintained a FC level of 4.2 ppm for about a week by injecting the chlorine mix directly into the return line using a peristaltic pump. The injection pump runs whenever the pool circulating pump runs which I currently have set to run 7 hours (10AM to 5PM)

My CYA is 25.
Water temp is ~70
I am not using a solar cover yet because of the birds. (that's another story)
My night time CL consumption is nearly zero so.......

Basically the system works like an erosion feeder but I don't use pucks and no CYA increase. This is an experiment which (knock on wood) seems to be working.