I have been patiently adding CYA to my pool to bring it up after a nearly complete drain & refill. After adding 12lbs of CYA I'm expecting a reading around 45-50ppm once this last dose has fully dissolved and circulated.
Last test I ran showed CYA at somewhere between 25 and 30ppm and I'm still having to add chlorine on a daily basis. I've been slowly ramping up the FC level to correspond to the CYA in the pool - once I hit 50ppm of CYA I'm going to be shooting for 6ppm of CYA and letting it drop to 4ppm before adding chlorine.
Based on experience over the last few weeks though, I'm seeing degradation of about 2ppm/day. It seems pretty consistent regardless of how much CYA is in the pool - so basically I'm still gonna need to add chlorine every day. Is that normal? I was hoping to at least get myself to an every-other day routine. My dog swims literally every day so I'm hesitant to load it up on Monday and let it degrade throughout the week...
Is there any rule of thumb for degradation rates and CYA/FC levels...?