Help don't know what's going on

So I'm on day 39 of flower with this Gellati and it's been a couple of days since I've noticed the edges of my leaves browning but then I noticed some orangey color spots but man it really progressed over the past couple of days. My runoff is 6.3 I use advanced nutrients micro grow and bloom along with big bud and recently switched to overdrive. I did a flush already. I also had a little spider mite problem recently I used Captain jacks neem oil and then soap and water. Took off most of affected leaves Any advice or ideas what this is it's been a smooth grow up till now?
 

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You may be right although it's an outdoor I kind of panicked with the spider mites and I sprayed them during the day with the soap and water when I noticed the captain jacks wasnt working after 2 weeks of use.
 
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