It'll be hard but I will do that. First picture had a more serious problem. I lowered the humidity and installed a fan inside the tent and that solved the issue until last week. They look kinda different but I think the first picture is a more progressed case of the second one.
I am growing in coco so it will be unlikely if I have any pests since the grow area has bug filters attached to windows. I don't think anything can come in. I had this problem with both plants but after moving the smaller plant to the bloom tent, red spots stopped forming. They striked back to the big plant in veg. tent last week. I don't think my case is a deficiency like Prof.'s.
I wiped the walls of the tent with diluted apple cider vinegar(1tablespoon/0.5l). If that doesn't solve the problem I might get some alcohol or Lysol to get rid of everything. I am considering foliar spraying with diluted vinegar as well.
Too bad we can't adress the problem directly. The affected plant is vegging for almost 4 months and I will be devestated if that big girl fails