They are under 400W HPS, I just started giving them a complete nutrient with NPK and cal-mag, they've gotten it twice in the last 2 weeks.
I'm not PHing my feeds My meter broke and I haven't gotten another. I guess I should really jump on that...
Cal-mag is goof to use as a foliage spray - but use at reduced rates - GO to Extreme Gardening.com" many commerical growers use theses products - there are 3 products that one can use to get giant root ball that makes your plant giant also. can give you the names of -, get the sample pack they offer for $15.00 (it's a bargain) no espom salt
Really in soil cultivation "PH" is not that big deal because the soil acts like a buffer - one less thing tom worry about. But if cultivating in Hydro - PH should be checked thru out grow
The white specs look like mite/thrip damage
