Once your plants have had a surge of growth the ppm should definitley be way up.. above 800.. probably 1200+..

keep the ph at 6.0

it will fluctuate.. you shuld aim for 6... if you aim for 5.2 you may be asking for problems.... your leaves should be green. if theyt are light green you definitley need to raise the ppm..

: )

picts?