OK my TF-100 kit came today (thanks Dave for the speedy order ). We just bought this home that came with a pool and although it looks awesome I would like to get your opinion. I always knew that the FC was high as it pegged my 5 ppm test kits. Turns out 32 drops to turn clear 16ppm with no CC (makes the OTO test useless). My CYC was at 100. So at 100 my FC should be between 7 and 12 (non SWG pools) I know for a fact that the pool service from the previous owner used 3” tablets. I have not added any chlorine. The feeder is now dry and just waiting for it to burn off. I plan on using bleach with the occasional tablet when we are gone for some time. So with a CYA of 100 would you drain down the pool some and re-fill to dilute the CYA or leave it at 100? If so how much down would you take it. My pool is approximately 12000 gallons.