Hey wiseguy316 I am new to growing cannabis I know in any type of hydro medium if the ph is off on the run off test you can just flush and start over. I have read to always ph your water for soil ? So what is the technique for getting a ph for soil ? Cause right now I ph my r/o at 6.5for example my tap water is 8 without any correction. My run off is generally 6 to 6.3 i don't mess with it.