Being colorblind, I have always had to have my wife help read strips from Baquacil when I didn't want an hour round trip to the store. The last couple seasons I had used Lamotte digital system and was decent. I know they also have systems for chlorine too. Is there any other brands they may work better? I am not able to use any of the color-based systems on my own without guessing which I do not want to do.