Opinions Please, possible mold issue

For awhile now i have had a plant that exhibits some signs of a mg defficiency.
I had to let her go in fear of this problem spreading,
but if this shows up again i need to know how to control.
I recently had a small prblem with russet mites which has long since been resolved.
the plant was showing signs of problems that would come par with russet mites,
most showing up with discoloration of youngest leaves and nute deficiencies that
were NOT caused by undernutrification.
Here are a few pics please give me some insight if you have any!!

more info available on schedual/treatments/products used/ etc....

Bro what the fuck is russet mites? You have spidermites and theyre not messing around.

What the heck are those little white worm things all over the leaf?

i dunno but ima gonna haz nightmarez tonight br0

Works for me. I use this as well as sulphur bomb to clean down after grow. Have had similar prob when I used a bag of soil from the garden that the kids had opened.

http://www.ebay.co.uk/itm/PLANT-VITALITY-P-KILLS-SPIDER-MITE-EGGS-LARVAE-50-ML-/270715287072?pt=UK_HomeGarden_Garden_PlantsSeedsBulbs_JN&hash=item3f07e37620

definitely not spider mites, this has to be another type of pest or mold.
I could see it originating from a bag of opened soil tho.
also take into account that this pic is zoomed 120x
thanks for replies i will try sulfur and a new mold/pest treatment
currently using azamax+bonide+greencure+seranade