My bad I misunderstood I thought you were looking for info, but with three different kind of bugs I guess you got it all handled; good luck with your cheap meters I'm sure they'll work well for you, just like your IPM
there looks like a few things that could be wrong but, my initial thought is to flush and then check the PH afer you flush. I have had nute build up before and it caused my PH to go out of wack. I am not an expert at indoor, just adding my thoughts. I started adding a little dolomite lime to my soil at the beginning of the grow and it seemed to help keep my ph down.
I normally would, but I cant feel the pot... and shes been 2-3 days between waters --- I had her split the diff. I also didnt want to make her get up at 0530 to water... anyway.