Dave said (on the Hey DAVE thread):
I believe it can test down to 0.05 ppm copper (and up to 1 ppm).Here is the copper test kit the tftestkits.net carries: http://tftestkits.net/K-1730-Taylor-Cop ... t-p57.html
I saw a K-1730 on the Taylor site. Which is better?
Are the Intex copper test strips (what I've been using since my SWG has a copper ionizer) that reliable?