Вот что говорят буржуи о ppm:
Ok
heres a chart adjust as needed to maximize growth with your particular
strains needs,This is just a good guideline to get you close enough to
insure no problems,To allow you to find your plants optimal nutrient
levels and adjust to the strains needs.A good thing to do is slowly
test your strains raise the ppm's a little drop it a little,Same with
the ph take note of the differences in growth save it and use it to see
where your getting the increased health and vigor then keep it set at
proper levels.Test it often through-out the whole grow slowly making
adjustments,You will eventually find the levels your strain best grows
at.All strains have different genetic make/ups,And will require
different levels of nutrients,And temperature/humidity levels to
maximize yeilds/production,So be sure to slowly change all aspects a
little at a time and learn your strain,Then maximize your growth/Yeilds!
Indica's
Seedlings and clones 300-400ppm 5.3-5.5 ph
early vegg 500-600ppm 5.3-5.6 ph
middle vegg 600-800ppm 5.4-5.6 ph
late vegg 800-1000ppm 5.5-5.7 ph
early flower 1000-1300ppm 5.5-5.7 ph
middle flower 1400-1600ppm 5.5-5.8 ph
late flower 1000-1100ppm 5.5-5.7 ph
ripening 300-500ppm 5.4-5.6 ph
sativa's
seedlings and clones 250-350ppm 5.3-5.5 ph
early vegg 300-500ppm 5.3-5.6 ph
middle vegg 500-700ppm 5.4-5.6 ph
late vegg 700-900ppm 5.5-5.7 ph
early flower 1000-1100ppm 5.5-5.7 ph
middle flower 1100-1300ppm 5.5-5.8 ph
late flower 800-1000ppm 5.5-5.7 ph
ripening 300-500ppm 5.4-5.6 ph
Взял отсюда.
http://www.icmag.com/ic/showthread.php?t=26343