When using Ben's Test kit, how important is color comparison? I currently have 3 different test kits and still feel like at times that I'm guessing values for chlorine level. I am just wondering what would be the easiest chlorine test without having to guess whether my chlorine level is closer to 2 or 3 or whatever. I am constantly asking my wife what color she thinks things are the closest to and it is pretty annoying! I would like to know how the FAS-dpd test compares to just DPD and OTO testing (which are the ones I have). Is there less color matching or is that still an issue? Trying to justify to the better half why I need one more test kit

Thanks in advance