Without nutrients just plain water what do u guys use, as in what's the ppm in your water? Basically mines somewhere in 200,300 range. And I had a issue last grow Well guy at the grow store said it was my water. That if it's over 50 ppm with no nutes he trashes it. Well the issue just came up on my current grow. And I have been using bottled filtered, been expirementing with filtered distilled and purified. But getting the ph at 6.5 or around has been a pain. It just keeps fluctuating, but I made a post on here with that pic and people said cal/mag should fix it. So can I go back to my water with 200-300 and not deal with the headache of bottled water. And just add cal mag to my tap ? It's not city water either.
So this is your second grow? Did your plants look fine through veg', and then "issues" arose shortly after flowering began (3-4 weeks)? Are you running different strains, or just one? If more than one, are they all affected the same? I would assume that you're using well water? Are you top watering? What part of the country (USA?) do you live in? High ppm's in well water can really mess up your grow especially if the mineral content is high in sodium, compared to calcium and magnesium. Do you actually know the mineral profile of your water, or did you just test the ppm's? Can you post some more pic's of the whole plant(s)?