Rust color spots on leaves

[Skillcraft]

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

 

[hotrodharley]

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?

 

[Skillcraft]

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.

 

[Arkos]

Looks like magnesium deficiency to me. Foilar feeding can work wonders for fast corrections.

 

[Skillcraft]

Ok. Do you have any recommendations on what foilar treatment to use. thank you for the help. Much appreciated

 

[Arkos]

Use your calmag at around 0.4 ec no need to ph and a good sprayer with fine mist.

 

[hotrodharley]

Use your calmag at around 0.4 ec no need to ph and a good sprayer with fine mist.

This ^^. Be sure to get the undersides of the leaves as well. As fine a mist as possible. Either right at lights on or at lights off.

 

[Skillcraft]

Ok will do. Thank you guys for the info. I am very thankful for your help

 

[roleth]

Ok will do. Thank you guys for the info. I am very thankful for your help

Im having the same issue. Did the foliar spray work?

 

[Skillcraft]

Yes the spray worked. I did as instructed above and it corrected my problems. Good luck and happy growing.

 

[roleth]

Yes the spray worked. I did as instructed above and it corrected my problems. Good luck and happy growing.

Thx same to you bro