Purple Kush 3 weeks flowering yellow leaves on lower leaves

i am doing soil foxfarm. 400 watt nextgen 12/12 lighting in a 4 by 4 growhut general hydroponics micro flower bloom. I am having yellowing of the lower leaves and on the tips of the top leaves turning yellow and curling. im not sure whats the matter i have been watering about every 2 days sometimes everyday. temps are high of light of 84 and night temps around 68 to 74. your feedback would be greatly apreshated.

I'm not sure what those spots are, they look more like damage rather than a deficiency. Are you sure there aren't any pests around?

I'm not positive about those yellow tips, but I think it's the beginning of a N deficiency, which is pretty normal on bloom. Otherwise, they look pretty healthy, although stretched a little.

the yellowing is a good thing. obviously not light burn if it's on lower leaves only. if not pests, foliar spot/blight is my best guess. did they get any cool water splashed on them last time you gave 'em a drink?

IMO

First i would say get them out of those little cups ..........

Check the PH

And their hungry . . .

transplanted to 3 gallion pots the plants are at a ph of 7. my nutrients are at 6 to 6.5. im using 5ml of micro, 13ml of bloom and 5ml of grow per every gallon. a gallon of nuts for 3 plants last me about 4 to 5 days. there rather short because i only vegged for one week to keep them small as i plan on doing ebb and flow after this so i decided on learing to make lollypops now. when do you recommend watering and how often and ammt?