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I have been using the pool calculator for several years and I like it...My latest pool number as of today are...salt level 3400...free chlorine 11.... PH 8....alkalinity 90...cyanuric acid 60...calcium hardness 475......The pool calculator says that scaling is likely the CSI is 0.44 scaling...

My test numbers today are: salt content 3400...free chlorine 11...PH level 8...Alkalinity 80...CYA...80...Calcium hardness 325...Pool Math recommends 18oz. of the muriatic acid. I am trying to keep the PH at 7.4 but this goal is hard to achieve. I am adding Muir acid every 3 days...Any suggestions

Hi, My current pool numbers are compiled using the Taylor2005 test kit with the addition of the R 0870 DPD powder to test Free chlorine. I am also using the Taylor salt water test kit for salt content. Pentair IC- 40 is set at 20% output. I run the pump 12 hours per day. Salt level is...

The pool calculator is terrific...Question...Calcium hardness section. What does REPLACEMENT CH MEAN??

My pool is well balanced except for the high TOTAL CHLORINE OR COMBINED CHLORINE IS 10.84 ... SALT LEVEL IS 3660....FREE CHLORINE IS 10.5....PH IS 7.6....ALKALINITY IS 80....CYANURIC ACID IS AT 55....CALCIUM HARDNESS IS 328 MY PENTAIR IC 40 IS SET AT 25% OUTPUT.....LESLIES IS RECOMMENDING THERE...

I am using the LaMotte borate test strips. Per my test today the test strip read 15ppm. Is it possible to have Borate in the pool if you have not added it?? This is a 2 year old inground Pebbletec 12,000 gal salt water pool using all Pentair equipment.

I have a pebbletec pool that I had built 2 years ago. At the moment I am working with CYA and free chlorine. It's good to be here...