Advice please read. =)

I'm in 6th week flower.
Temperature 29 degrees Celsius
RH 50%

when i have the humidifier on i can sustain the temperture, at the same time i have a dehumidifier sucking out the excess humidity. Without the humidifier running the temperature will rise to 32/33 degrees Celsius and my RH will drop to 20! IS THIS BAD!! HUMIDITY VS TEMPERATURE!

Another thing I am getting powdery mildew. I would rather have loew humidty and high temps then mildrew!!! Any advice please.
 
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