Hey guys! I’m new to this whole thing. I was given some baby plants several months ago. Blundered my way through them, didn’t know how old they were, what they were, never grew anything like this so I experimented. By the time they flowered I had acquired a grow room, lights etc etc.
I got really interested. Bought some seeds from the site got a good set up and keeping track and monitoring everything I can. Granted this is a closet grow and not looking to do anything special with any of this but I’d still like to learn without blowing 5000 dollars on equipment and making my brain hurt with science every day.
I’ve got these plants going and I cant figure out what it is. I’ve dug and dug and dug through pictures and articles and it looks like 1 of 3 or 4 different issues. I balance my ph at as close to 6.5 as i can get it, sometimes i let 6.2-3 go, i use litmus paper, 2 electronic pens and test powder for the PH mixing. Temperature stays right around 72-74. I have fox farm soil mixed with some black gold and coco coir. Watering about every 3-4 days never spraying the leaves. I water a bit against the stalk and then in a circle around the plant to promote root growth. I have a Co2 concoction that allows the tent to hover around 1000ppm. Sterilized the tent before planting and sterilize the tools periodically, and go to great lengths to ward off any type of mold/insect infestation.
I’ve got them on a 17-7 light cycle.
I’m not using an nutrients yet as I believe the soil itself is enough for the time being. I’ve got the light fixtures about 18 inches above the plants and started them in 3 gallon cloth pots. I have a small fan above and one below the plants on a low setting and have a vent fan that shuts off at night with the lights. I have a humidifier to keep the humidity up between 45ish and 52 is about max at this point.
The pictures below are of the problems I’m having and cant quite figure out the cause. ANY tips would be helpful, if you want more pictures just ask and I’ll post them asap.
this first picture has 2 spots that look strange to me and the leaves all have a bit of yellow along the ribs of the plant.
Now I know some of you may get sick of leaf questions but i really did look through a lot of posts and i didnt see any problems like the ones i see here. Perhaps i skipped over the threads or maybe this is the starting stages of the more advanced pictures i saw. Any Knowledge would be greatly appreciated.
And down here I wanted to ask, should I cut more of these leaves off? Plants are just under a month, and roughly 6-8 inches tall. I topped them maybe 5 days ago and man they just grew more furious and its a jungle now. Should i cut them again? and where? The bottom smaller leaves? These are 2 different plants btw.
I’m new to this process and to the community so be nice! 
Thanks a ton guys!