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i do have an inline fan 200cfm, and fresh air vent for air to come in, also 16" osillating fan. humidity is between 38-50, but mostly stays at 40, temps are good as well. they are cupping but not crispy, leaves still seem healthy, its under 400w hps, 12/12 on its 6th week of bloom, in a 4x4x6...

thnx, will move fan towards top of plant, temps are at about 80-85, with light, and about 70-75 with lights out.

hi i have a plant, its top leaves are cupping badly started happening a few days ago and seems to be getting worse, i think its mg def, anyone have any ideas?

dont know if this will help, but heres whats in my bloom nutes that iam using: bloom A cano3-calcium nitrate.....5.9% kno3-potassium nitrate....2.53% khno-not sure.....0.68% iron chelate.....0.043% nitric acid.....0.20% bloom b kno3-potassium nitrate....2.53% mgso3-magnesium sulfite....1.23%...

no i meant dutch nutrient formula, dnf. Also after carefully examining the problem solving chart, it looks like it may be a mg def problem, guess i will try adding the epsom salts to the water to see if that helps or would a good flush, followed by nutrients on the next watering be ok.

thank you for your quick response, so would i up my nutes?, so how do i decrease p while increasing n and how would i go about correcting this problem?

Hi, heres the deal, northern lights x buddha, 6weeks into bloom, grown under 400w mh for veg, and 400w hps for bloom, used dutch nutrient formula grow a and b, for veg and am using dutch nutrient formula bloom for flower, been giving 2.5ml per liter of water of a and b bloom which is half of the...