The reason I asked:
In reading through this article (http://truetex.com/poolcontrol.htm) I was not so interested in his computer controlled direct injection of chlorine set-up as I was his opinions on CYA and running a pool with 0% CYA.
I was wondering if my pool could be run with very little CYA, perhaps 10ppm, with the SWCG set on a high level running 8-10 hrs/day during daylight hours. Simply trying to figure out if a SWCG has the capacity under these conditions to maintain a chlorine level of 1%-2% in my 20,000 gal pool.( It appears that he determined he needed an injection of 250 mL/hour of chlorine during daylight hours into his 27,000 gal. pool.)
So, I was just curious as to the feasibility of running very low levels of CYA in a SWCG pool.