brown orange spots

  1. C

    Orange / brown spots calcium , magnesium defiency or rust fungus?

    I have been giving these plants R.O. water and have been supplementing with cali mag since the beginning. Was giving 1teaspoon per gallon in veg., and 1/2 teaspoon per gallon during flower. Does any one know why there is orangish brown spots? I use a powerful LED light but is about a foot away...
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