widows look good, most of them look good except for the og kush and these
the rockwool cubes shouldnt be exposed like that.^^^ they are prone to get algae and theres a bunch of other problems, cover that with a good half inch of soil at least.
your leaf yellowing and blotching, its gotta be something in your medium, they are getting nute lockout from PH inbalances, i wouldnt really rely on that meter for a PH reading. if you got a little extra cash go buy a digital meter, do a nice flush, read your runoff, etc.
most of them look pretty healthy though, you are going to need to upgrade your bulbs and space for that many plants, but i see you are already on that, a 400 HPS should do the trick.
the rockwool cubes shouldnt be exposed like that.^^^ they are prone to get algae and theres a bunch of other problems, cover that with a good half inch of soil at least.
your leaf yellowing and blotching, its gotta be something in your medium, they are getting nute lockout from PH inbalances, i wouldnt really rely on that meter for a PH reading. if you got a little extra cash go buy a digital meter, do a nice flush, read your runoff, etc.
most of them look pretty healthy though, you are going to need to upgrade your bulbs and space for that many plants, but i see you are already on that, a 400 HPS should do the trick.