Anyone out there have a testing kit they use (mainly interested in one for Nitrates) that they are happy for. I currently have three different ones all of which I am not pleased with. I will get the brands when I get home. I am tired of having to guess what my nitrates may be. The spectrum is too broad of a guess. When I look at the readings they can be anywhere from 20-100 depending on my perception of certain shades of red, orange, yellow, etc..
