Please explainyeah, i had a cheap RO system but being on a well, it wasted way too much water in my opinion.
i think 300 total should be fine for veg.
do you know how to "read" your ppm meter to see how they are feeding?
First thing I checked and continue Too.I'm not reading 4 pages but you've checked for bugs right with a scope? Damage to new growth first like this sure does scream Broadmites if you haven't checked… any clawing should be checked for BM right away, especially for a novice grower… those fuckers once doing damage are a fucking nightmare!!