ok....so if runoff is 400 and input is 600 that means that they are now starving
which means they need to be bumped up to say 700ppm
this is why when I figured out the ratio for CNS I stick to it
18ml of grow or bloom and
silica blast to 5.8 ph
dosnt fail
I have grown about 30 dif strains ranging from landrace sativa to GG4 all took the feed perfectly
both under fluoro/T-5/LED/HPS
didnt matter it evens out
I think maybe you were letting the plants dry down to much
now that you are keeping it even the plants are stabilizing
so I would bump up the feed