@FullAuto245 - Hey man, morning. My under the sink filter, RO, make's my water at 7.8 ph, 0090 ppm? Not sure about that PPM meter yet, just got it. Yes, that ph up & down is very strong! I allway's ph my water to 6.5, start to finish. I also dried my last harvest in my tent, had a 6" fan way down on the bottom of tent pointed to the wall, vent open at bottom, big vent open on top, chopped whole plant, minus the big, mostly dead leave's. hung at top for 6 day's. Zip that tent up and do it. I can smell that good stink from here!