Rust color spots on leaves

S

Skillcraft

Well-Known Member
I have rust color spots that are spreading slowly on my plant. I grow dwc and run GH nutes and 1000 ppm. My humidity is around 50% and my water temp is 64. My air temp fluctuates between 72-77. For lighting I have 2 electric sky 180s at 12 inches from canopy. I thought it my be a calmag problem so I upped the cal mag from 2 mils per gallon to 5 mils per gallon. The spots are only on top leaves closest to the lights. I am in my 4th week of flower. Could it be a lighting issue? Any and all help will be appreciated. Thanks in advance
 

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May I ask if you’re waiting for something to make those spots disappear? You’ve addressed the situation. Has new spotting appeared since? How long has it been since you gave cal mag?
 
I believe you are on to something hotrod. I think I am just overthinking things. This is only my 4th grow and I have been fortunate to not have any issues with my first three. Thank you for taking the time to reply. Much appreciated.
 
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