Seedling stunted. Reasons? Overwatering , pot size? Light distance? , please help!

Hmm, not too sure here, but I have all pots that are plastic/ that don't let air in...are out of service for my weed experiments after my last issue plant will be harvested from it.. too much water can become a problem with little water, because the earth can't let the water flow and reach all parts.. (and suffocate a plant easily too it seems) I'm thinking of giving more and more importance to airy earth.. Good luck with the grows!

I think your main issue all along was your ph in soil. I imagine it is still a issue. That is the root of all the issues. Make sure your run off ph is in acceptable range to grow in.