Possible Mites? PH flux or Nute Burn? HELP!!!! PLZ

Lately my plants are having huge issues.... I am using a hydro DWC. Plants start out fine, but recently they start developing these spots then the leaves start dying out...

Attached is a pic showing some of the spots and the leaf necrosis ....

I have looked at all the plant diag posts and have tried different things from changing water and nute solution ... lowering nute to flush ... raising nute for underfeed .. PH is constant around 6.2 ... think it might be mites .. tried one mite solution and next day 4 other plants had the spots on them .... clipped off all the leaves that had the spots and now gonna try a differnt mite solution also .... seems like I might have multiple problems going wrong ....

PLZ HELP!! My ladies are dying ....

Yea, It looks to me like you got bugs.

Spider mites usually leave smaller dot on the leaf. Look under the leaf, Look close, see the suckers? then its spider mites. If the top of the leaf has like a powder on it, look into Thrips.

I dont know what that is but I can almost say with certainty that is not mite damage.