the strips I use are lab-quality, I just collect runoff in a cup, drop a strip in , and look at it 5 minutes later ... its very easy to read, the colors stand out well , and as for the 5-10 minutes involved, it aint like I'm too busy ... I see the electronic ones need periodical replacement of their sensors ... more $$$ ... I'll stick with my 20th-century strips ... I grow in soil, so I don't do a lot of frequent testing ... if hydro, I expect I'd go electronic ... :jointsmile: