I purchased a Taylor K-1004 residential troubleshooting test kit 2 years ago and have been using it since. It only tests for chlorine (FC, CC, TC) up to a level of 5 ppm, Ph level, and alkilinity. I purchased new bottles of reagents about a week ago before finding this site. My question is this: Can I supplement this kit for testing CYA, calcium hardness (vinyl above ground pool so not sure if CH test is necessary), and FC above 5 ppm (for things like shocking the pool) or am I better off just buying a new test kit that has all of these tests? If it is recommended that I get a new kit, is the TF-100 or the Taylor K-2006 the way to go?