Unkown problem help please

3 weeks into flowering 2 600watt hps in grow tent exhaust setup plants 3&half FT stained white leaves doesnt shake off and white dots on the backside of leaves pics hopefully uploaded having trouble with pics from my ps3 browser

what is your ph?

7 but fox farm trio in happy frog my tap water is 7 i never let it sit out like i should i read white powder mold is common on plants touching mine were crammed together 1st feww weeks or u think bugs? sm 90 1nce didnt work maybe milk maybe baking soda?

Spider mites bro.

so y didnt the sm90 work? do they stay white? does it affect the buds? how will i kno when there better what to look for? more sm90 ?

??any 1 else?

i'd say spider mites too you should check your plant to night with a flash light under and on the leavesand if you see small little brownish bugs its spider mites and there are many ways to cure it

Is there ever a point where its to late? What if i have all 6 three ft plants severely infected will the buds still b good? Calicleanser isnt to late in the flowering cycle?