This is what I is is test soil pH. A lot more accurate than testing water and guessing .As your nuts breakdown they cause soil pH changes. Even if you add low pH water it'll still get buffed by microbes and nuts .this test kit was 20 at Lowe's and test for NPK also.
So I transplant one of my babies two days ago and I'm still seeing drooping .Now chlor is dying. Same pH 6.5 to 6.8 soil temp was the same. running 2 65k and too deep purple cfb .Nites looked good last sample .Looking at high n med p med k. Veg at 20 on 4 off. Water after trans, new med was...