About a week ago started to get these rust colored spots but only on one plant (different strains) its only on leaves connected to flowers that seem to be doing really well. I took a few off and inspected under a microscope and didnt see any webs or anything moving. No bugs. Is this the plant getting close or am i not giving it something. 1/2 strength fox farm nutes every other watering. Cal-Mag, ph 6.0 waterings I did give a small amount of chaching from fox farm as well. Flowers are looking and smelling strong.