my babies are sick...hope its not swine flu!

Hey fellas,

im having a big problem with all of my plants now. The lower leaves are turning pale yellow w/ brown spots and patches and are very brittle.
Ive added ph down a couple times during watering but the ph is still high.

just need a couple tips if any would mind helping me out.

thanks.

What is your experience level? First timer

Your Equipment:
.1) Type and wattage of lights. 4 26w 6500k CFLS, 4 42w 6500K CFLS
.2) Distance from tops? 2-4 inches
.3) Reflector type? bare bulbs
.4) Is there a consistent fresh air supply? yes
.5) Do you have an exhaust fan and a circulation fan? just an exhaust fan and passive intake

Your medium:
.7) Specific brand and type of soil. Calloways Premium Potting Soil w/ sta green vermiculite, miracle gro perlite, and miracle gro spaghum and peat moss
.8) Size of container. i dont know
.9) Did you use peat pucks (or similar) to root clones or germinate seedlings? Peat pucks from seedlings

Your nutrients and water:
10) Source of water? Distilled What's it's ph before adjusting? I dont know
11) Method of checking water ph. (ph pen, test strips, aquarium test kit...) N/A
12) Method of adjusting water ph. (phosphoric acid, white vinegar, hydrated lime, PH Up...) aquarium ph down
13) Specific brand and N-P-K ratio for each bottle. List dosages (quantity per gallon) and current feeding schedule.
14) How often are you watering between feedings, and how much per watering? 1 -1.5 cups per plant every few days
15) Any additives or tea's? (Superthrive, CalMag, molasses, Mother's Earth...) no
16) Are your ph levels stable, or do they fluctuate? soil ph stays at around 7-7.5
17) What is your ingoing water's ph? ...your runoff ph? n/a
18) Do you foliar feed? If so, with what, how often, and at what time do you spray? sometimes i spray the leaves lightly w. distilled water

Your growroom:
19) Indoors or outdoors? Indoors
20) What size of closet, room or hut? Wardrobe box : 10 sq. ft
21) What are the temps and humidity levels while lights are on? ...With lights off? n/a
22) Have you seen signs of insects in the growroom? no

Your strain:
23) What strain are you growing? (Indica dominate or Sativa dom?) bagseed
24) From seeds or clones? seeds
25) Is this an autoflower strain? doubt it

According to this..

Troubleshooting cannabis growing health problems.

Pics 1,2 and 4 look like a MG + MN deficiency.
3 looks like overfert' and 5 looks like its lacking K hard out.
All of which could be PH.. what is it? Do you test? and if so how?
"11) Method of checking water ph. (ph pen, test strips, aquarium test kit...) N/A"
Also.. how do you know this...
"16) Are your ph levels stable, or do they fluctuate? soil ph stays at around 7-7.5"

If not.. u sure had better start soon.. nobody will be able to acurately help you with these issues until you have a good ph.. then work from there.

Cheers