first grow black spots (pics included)

[stinkyattic]

-soil, soilless, or hydroponic--------organic pete soil
-Soil pH - 6.0 - 6.7 for all three
-Water source -spring jugs - (wondering if this is ok or ) or Tap W/ cal-mag - what is cal-mag please?????
-Water pH - adjusted to 6.5 ish before watering
-Type of ventilation your room has- fan on right blowing outwards littlwe fan on bottom and a/c vented to my closet

Okay these are the things that stood out.

Peat based soil is very low pH. You want 6.5-6.8 for your soil and water.

CalMag is a micro supplement that just has Ca Mg and I think some Si(?) in it. You don't have to use it with tap water, and tap water is FINE.

Water pH- adjust it up to 6.9. I think you are seeing pH lockout problems plus....

Your ventilation is inadequate. That was my first impression actually seeing those blotches. Your plants are quite literally suffocating. You need to be bringing in plenty of fresh air, especially when the lights are on. This may be as simple as simply opening the door to your grow chamber during the light period.

Also I didn't see, but check that you have a gallon of soil for each foot of main stem on that plant. Rootbound plants are a right bitch to troubleshoot.