I've been debating whether or not to do a partial drain to lower my high CYA and CH levels, or just keep adding bleach to keep the FC levels in the range recommended by the Best Guess Chart. From a cost perspective, I believe keeping the higher FC level is best, but I'm concerned what is tolerable and safe for the swimmers. I'm adding roughly a gallon and a half each day (or just under 3 gallons every other day) to get back up to a ~10 ppm FC level. The water clarity has never looked better since using bleach and getting rid of the pucks a week and a half ago, and a Taylor K-2006 test kit to get accurate readings. I have recent readings I could post, but my main concern is.....is there a FC reading you don't want to be above, regardless of CYA reading, to be safe for swimmers? This is for a 23k IG gunite pool. (CYA continues to read 100+....about 35 drops and the dot is not seen).

Thanks!