15-20 really here for a good one it is about 40 minimum and then you have to get calibration solution and cleaner and keeper solution. to get a complete tds ec and ph tester here it is close to 400 when all is gotten.
MadSativa Reviewed by MadSativa on . Correct pH for soil... If your soil is either acid or alkaline, would you need to adjust your water/nute pH accordingly? For instance, my girls are suffering from lockout due to soil being slightly alkaline. In order for my runoff to come out at a pH of 6.5, I had to flush with plain water pH'd at 5.1. My question is, should I always feed/water with a pH of 5.1(+/- depending to run off)? Or do I continue to feed/water with a pH of 6.3-6.7? The goal is to have a soil runoff pH of 6.5 correct? I was Rating: 5