Ph issue?

I’m currently 49 days into flower I’ve been using fox farms full line of feeding. Ph pen is blue labs water ph has been 6.3-6.5 this just started 4 days or so ago temps have been 75-78 humidity 45-50% humidity night temps have been 68-70 36-50% humidity IMG_1972.pngIMG_1974.jpeg
 
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