Follow Waterbear's advice above pH and TA. Calcium of 220 is ok. The Taylor K-2005 is not what you want. It can only measure chlorine levels up to 5ppm whereas the K-2006 can measure to around 50ppm. With high CYA like you report, you'll have to run high chlorine levels. If you haven't already done so, please read the Best Guess Chlorine Chart in my signature below about the connection between CYA and chlorine levels. You need to get the K-2006. You'll have to order it online. It isn't going to be available locally.