Unusual Spots

Any ideas on what might be causing these spots?
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Details: Sativa, nutrient film technique, Week 6 of 12/12
Ph 5.87, Water temp 74°F, Air 73°F, 400watt HPS, 400watt MH
General Hydroponics recirc program up until last week.
Fresh Water only this week. 907ppm TDS

LOOK LIKE SPIDER MITES....AHHHHHHHHH.more pics??

your close to done though so just watch it real close for bugs or liottle webs....

i have lil black spots could that be caused by misting it to much, because water magnifies light?

OH fuck thats what my leaves are looking like and I just found some webs last night...