White Widow Auto - Plant 3

This week things started to go to shit a little bit. The thrips were a reproducing and growing in numbers, the homemade soap spray I used seems to have burned the fan leaves a bit, think it was too concentrated. I also have a cheap soil ph meter which is reading over 7.5 so have been using ph 5.5 water to try and bring it down - this could also have caused the leaves to be dying I think...any guesses? Buds are in affecting and still lookin pretty good