As an offshoot of another thread (on chlorine true costs), I bring out this discussion, mostly by trader4 and me, on what the *actual* effect is of CYA on chlorine sanitization for an *outdoor* home (uncovered) pool.
To repeat the starting point, this chart, which is what "I" follow, shows that the target free chlorine levels are (far) higher than most people think, for a decently high stabilizer level (my pool has CYA of around 50ppm):
Page 9 of this article discusses how CYA increases kill time:
While the "chart" is intended to be a *pragmatic* tool for the outdoor pool homeowner, the science is what we're after:
Anyone with experience with the interaction of iso-cyanuric acid (stabilizer) and desired free chlorine levels is welcome to add value here, as I simply follow the recommendations from the "pool school":