tacoing leaves, brown spots

[MEDEDCANNABIS]

What is your experience level? (first timer, novice, experienced...) second grow, first aeroponic

Your Equipment:
.1) Type and wattage of lights. (MH, HPS, CFL's, tube fluorescents, LED's) 400 watt mh, 4 100 watt equivalent clfs side lighting with
.2) Distance from tops? about a foot from mh and 3 to 4 inches from clfs
.3) Reflector type? (cool tube set-up, bat wing, enclosed reflector, bare bulb...) bat wing?
.4) Is there a consistent fresh air supply? in a basement fan blowing, heat register open
.5) Do you have an exhaust fan and a circulation fan? circulation fan
.6) What are the bulb wattages, kelvin ratings, and schedule? 400 and 4 100 watt cfl equivalent, 18-6 schedule

Your medium:
.7) Specific brand and type of soil, (coco, peat based soilless...) and anything you've added to it. (vermiculite, perlite, worm castings...) hydroton rocks
.8) Size of container. about 40 gal with 10 gallons of water
.9) Did you use peat pucks (or similar) to root clones or germinate seedlings? i got clones in spongy medium stuff, i forget what its called

Your nutrients and water:
10) Source of water? (tap, bottled or filtered) What's it's ph before adjusting? tap water ph of about 7 before adjustments
11) Method of checking water ph. (ph pen, test strips, aquarium test kit...) ph drops
12) Method of adjusting water ph. (phosphoric acid, white vinegar, hydrated lime, PH Up...) ph up/down
13) Specific brand and N-P-K ratio for each bottle. List dosages (quantity per gallon) and current feeding schedule. techniflora starter kit, about 400 ppm right now
14) How often are you watering between feedings, and how much per watering? i have the 1 minute on 4 minutes off timer that runs during lights on
15) Any additives or tea's? (Superthrive, CalMag, molasses, Mother's Earth...) calmag
16) Are your ph levels stable, or do they fluctuate? pretty stable
17) What is your ingoing water's ph? ...your runoff ph? runoff gets reused
18) Do you foliar feed? If so, with what, how often, and at what time do you spray? ive used thrive alive b1 twice, using it weekly during light on

Your growroom:
19) Indoors or outdoors? indoors
20) What size of closet, room or hut? 4 ft by 3 ft, glossy white dry erase board
21) What are the temps and humidity levels while lights are on? ...With lights off? 75-80 and around 25%
22) Have you seen signs of insects in the growroom? had recent spidermite infestation, treated with neem, no signs now

Your strain:
23) What strain are you growing? (Indica dominate or Sativa dom?) 2 sour diesel, 2 new york city diesel, 2 white widow
24) From seeds or clones? clones
25) Is this an autoflower strain?

watering at 1 min on and 4 off??? overwatering