Can’t diagnose this DEF, Should I flush my plants or buff up the nutes?

@Chubbs thank you so much for you time and reply, just checked the leaves, it’s actually residue from nutes I no longer use anymore since i switched to rhizotonic. and if it CalMag, should I lower the ammount I give or buff it up? Should I still flush?

To me it looks like your having issues. The leaf discoloration and rust spots could be a Calcium and Magnesium deficiency. But also all those white spots or tiny dots on the leafs may be mites. I would recommend looking at the underside of the leafs with a jewellers loop to double check. Maybe test your run off ph to see what it reads to. Just a couple idea's hope it helps Happy growing.