R rlirwin AC Members May 19, 2007 5 0 1 Apr 28, 2016 #1 I bought a new nitrate test kit and the colors are different that the old. Unfortunately, I thought they'd be the same so I didn't keep track of which was which. Any idea how to tell? Thanks
I bought a new nitrate test kit and the colors are different that the old. Unfortunately, I thought they'd be the same so I didn't keep track of which was which. Any idea how to tell? Thanks
