What is the best nitrate test kit i have salifert but trying to figure out the color is a little complicated when i lay it flat i get one color and i put it up on the side i get another help!!!!!!!!
That's how it's supposed to be. If you place it flat against the card and sometimes it's too faint of a color for you to read, look at it from the side so the color is darker and match it up with the color on the card and divide by ten.What is the best nitrate test kit i have salifert but trying to figure out the color is a little complicated when i lay it flat i get one color and i put it up on the side i get another help!!!!!!!!