Using the pool calculator, for a CYA of 20ppm, it recommends a range of 2-5ppm of FC. Does that imply that 20ppm CYA can protect 5ppm FC from UV degradation?
Say those levels are in a pool in full sun in a perfect world, no organics or swimming activity, would you expect to still have 5ppm FC when the sun goes down?
Say those levels are in a pool in full sun in a perfect world, no organics or swimming activity, would you expect to still have 5ppm FC when the sun goes down?