looks like its def in everything, lol
ya 650 ppm is really really low for week 4-5. I'm in week 4-5 myself and I just had to up to 1200 ppm from 1000 because I was getting mild deficiencies.
i dont have root aphids, but i do have a small case of thrips ....
well i got off the phone with my uncle, he uses the same fert along with promix....i water @ 650 ppm every 2nd watering, he told me that he feeds at 1000ppm every 2nd watering, and that he said i was not feeding enough....so basically he said yo give 1000ppm of ferts and 100ppm of epsom salts, for a total of 1100 ppm....this seem kind of high to be watering every second watering, no?
well i decided to make a little experiment...today i watered the whole crop as normal, but raised the ppm of 2 plants to 850...if they get worse, i know i am over feeding, if they get better then i know i am underfeeding .....