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Powdery Mildew help!

Just watered one of my girls and noticed the start of powdery mildew :( I'm gutted as I've got 5 more plants in there! I haven't checked them fully yet but they looked okay when i pulled them out to feed them. I'm now worried my whole grow is screwed as I had both tents open when watering so my big DWC plant could be contaminated! :( 


This one plant is just behind the fans spread and although i have a 12L dehumidifier on 24/7 and set to 40% it stays at 55% RH as i didn't want to put the dehum on max as the tent goes to 80F+ and all my terps are gone.I wanted to sort her out and put another fan in there to move more air.


Do I bin her or fight it? She was flipped on Sat 11th Jan 2020 and should now be at 4 to 5wk n a 9 week cycle. She smells lovely.


Any help on the next step would be appreciated.





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