Now let me ask you this is something I've grown concerned or curious bout , I use a Ppm pen pretty sure it's a tds3 pen , ok so I measure my water 117 or 103 that's bout were my tap water runs , I add my nutes if I wanna feed 800 I add 900 and some change to equal the range I wanna feed , every watering and every feed I check the PH OF MY RUN OFF , ph stays around 6.2 to 6.4 as I'm watering with 6.2 to 6.5 water and nutes each time BUT HERE IS THE KICKER I DNT UNDERSTAND when checking the runn off ppm since my meter only reads to 999 then shows x10 it's hard to understand . Take lastnight for instance I fed 900 ppm on 3 plants two plants I only have ph water to the run off on each of them was reading 103 x10 so that would be 1103 some two plants I think ppm run off was 126 x10 so 1126ppm correct so if I'm feeding 900 all the time and it's coming out 1126 then why would it be higher then what I feed cause of salt build up , but when I feed and water I always always give alto of run off 3 gal containers getting 1- to 1-1/2 gallons of water that makes the soil wet but not like soggy as cause I use a good bit of perlite , so should I back off my feeding amount , mind you I just increased the feed from 750 to 900 ppm .. But I've checked the run off all way threw and it's always been higher then my feedings . I've heard talk bout if my ppms was to higher then I would have a higher or lower ph level can't remember which is it... But my ph is in sync with what I'm puting in ,just ppms r higher ... My plants look great they have great growth I am anal bout everything I do with them do neglect isn't something to consider , but I've heard u couldn't read ppm run with certain meters cause what the r designed to read . So if anyone could clear that one up would be like 100 gold stars for the day .. Should I continue with what I'm doin or do a hard flush and start over I've heard a emergency flush is not good to do but idk never have had a issue with my feedings and such !!!!