I'm also interesting in salts vs ppm. I have a gro check meter and am I trying to learn how to harness the readings. pH 6.34 (Should come down a little), uS 530, ppm 240
SunLake Reviewed by SunLake on . 1st timer hydro with PPM vs. salts ???s I'm going hydro for the first time and I am confused about salt build up and PPM levels. I'm using a small pvc ebb and flow system with a 6 gal tub. My clones are still fairly small and look fine. My question is when do I start to get concerned about salt build up? I'm sitting at a PPM of 775 and keeping the PH between 5.75 and 6.25 (usually right at 6). Is the PPMs the only indication of salt build up I have to keep an eye on? If so, when do I start getting freaked out about it? I've Rating: 5