It's great that you tested, but why complicate things by adding compounds? If you are trying to test/diagnose any problem you would want to simplify things as much as possible first, whether it is a mechanical problem or something like this. So now you have multiple compounds with so-so results and are left guessing at the results. It seems like you have 3 choices: 1) the bayer is underdosed while the pct stock is good, or 2) the pct stock is underdosed while the bayer is good, or 3) both are a little underdosed. Bottom line is you are left guessing with testing like this which is why i would keep it simple myself going forward. I'm glad you got a test, but it would have been better to test one or the other instead of both.