I have the TF100 test kit. I have a very hard time matching the colors of the pH. The color I get when I test my water is never any of the options (7.5, 7.8, 8.2) and I just have a hard time guessing whether it is 7.7 or 8.0. I'm pretty sure it is high, I just don't know by how much. In an attempt to get a better idea I bought some pH strips and they are too general (just say pH level ok but don't give a specific reading). The pool store says it is 8.0 today. Even knowing that when I tested myself I just wasn't sure. Any suggestions for a better (easier to read) pH test? Thanks!