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Apologies in advance if this has been posted elsewhere but I can’t find it. I have spa with a spillover and I have always assumed that if I’m testing the pool chems then those results should be good for the spa. Looking at a calcium build up on the glass tile in the spa, it made me start...

Hi all, Three weeks ago I drained approximately 80% of my pool water due to high CYA level. Since then I have been getting the chemical levels back in balance. So far so good with everything except the PH level. Following pool math, reading Pool School and checking chemical levels daily, for...

So I have an extremely high CYA level for my pool. Pool builder does not recommend draining the pool, recommends leaving as is and adjust the FC level. The pool is just over 1 year old and at this point I am not sure how the CYA level got this high. No issues with algae until a few weeks ago. I...