Blue Mystic-is This A Mag Deficiency?

[Pigailia]

I have a Blue Mystic that is 2 weeks into flowering. GH nutes, bubbler, 430wHPS (18 inches over plant), pH steady around 6, currently running an EC of about 1.5 (about 1050 ppm). Middle and lower leaves develope yellow/brown spots in the body of the leaf that spread to kill the leaf. I was running about 800 ppm until yesterday, so I don't think it's nute burn. Burning does not start at the tips or edges and the leaves don't curl up or down. Please take a look and tell me if this is a mag deficiency or something else.


Pigailia

[Ganja Guerrilla]

I think your PH is high 5.5 - 5.8 is optimum

nitrogen, potassium &/or magnesium def is my guess, this leaf damage is always difficult because I believe you have more than one symptom showing

lower the PH and give it 1 teaspoon per gallon of epsom slats (mgso4), if that doesnt change it you may need to bump the nutes

[Pigailia]

You may be right about the pH, but......the reason that I upped the pH to the 6 area was because the chart that shows nutrient uptake levels at various pH readings indicates that a higher pH makes more mag, etc. available to the plants. Is this faulty reasoning? I had this problem one time before growing 'HOG' and never did figure it out. I'll give it a shot starting tonight and see what happens. Thanks for the suggestion.

Pigailia