First grow (cfl) need some help/advice!!!!!!!!!

hows it going everyone, first time grower however ive did a lot of research prior to starting. Ive been trying my best to keep my babies healthy however, i run across some problems that i do not know the solution to.
Problem:very very slow growth/ weird spot/burn on leaf
Room: about 3x8 (no windows)
temps: 71-81
Humidity:40-50
Nutes: Jungle Juice part A&B by advanced nutrients, humboldt honey carbs, cal mag
Lights: 125, 23, 23 watt CFL's all 2700k
Vegged:2 months
Flower: 6-7 weeks and counting
Strain: Og kush (bagseed)

At first i thought it was a c02 problem due to the fact i have no windows in the room, so i went and bought a c02 generator (green pad) however i dont notice much diff.
ALSO****IVE HAD A COUPLE NUTE BURN AND TEMP PROBLEMS IN VEG, AND THE FIRST 2 WEEKS OF FLOWER OR SO THE LIGHTS WERE MANUALLY TURNED ON/OFF BY ME DUE TO THE FACT THAT I DIDNT HAVE A TIMER AT THAT TIME.****

Whats your feeding schedule, whats the ratio of nutes you are using?

Using jungle juice part a&b at 5ml a gal each, 5ml a gal of cal mag, 3 ml of humboldt honey carbs. probably feeding around every 2-3 days. I do not have a digital PH meter, therefore its hard to keep the PH the same every feeding, so i try to keep it between 5.0-6.0. Also i am using coco mix and tiny rockwool cubes as my medium.

If you don't have a ph meter, how can you be sure you're maintaining 5.0 to 6.0 ph?, maintaining ph is important, also it's would be a good idea to have a tds meter to keep tabs of your ppm's.

i don't have a digital ph meter, i have the one where u put some water in a tube and u drop some solution into it and it changes color

That's fine for water, but waht abt checking you nutes? just the color of the nutes makes it difficult to test with those drops.

uhhhhhhh.....lol you add all the nutrients to the water then u test it. Its clear to see the solution in the nutrient water.

I know you check after mixing, my question is if the nutes change the color of the water and the drops depend on color change, how do you know you're getting an acurate reading?