So I've probably spend 20 hours reading thru the forums and have been absorbing all of this great info. After finally receiving my K-2006 kit today, I've got a baseline set of numbers to try and fix the disaster that my pool service created. When plugging in my numbers, I get a different shock level in the Pool Calc than what is listed on the CYA/Chlorine Chart. What am I doing wrong? Screenshots attached. Not sure if I should shock at 21 or 30. Thoughts?





