White Diesel Auto First Grow!!

So here is my grow room, i got 2 lamp 600W , a good ventilation i will provide photos later! i start with 20 seeds of white diesel automatic. At the moment i got 13 i am on the 3rd week , got some problem with the air humidity at the moment, is arround 30% cuz i dont have a tent i hole room . Also my ph is arround 7-7.5 but i dont want to add more nutrients, any tips guyz or suggestions glad to hear them !

this week was the most difficult because the plants had very obvious problems, I stopped watering and the surge of water sores for 10 days. Yesterday you gave them 1.5 liters of water and 2 Ml / l of BioBacteria Oganic. As you can see from the photos, many of the plants have brown stains and their leaves turn upwards, too, some of them have holes and their leaves are dry and fragile. I think if I touch them I will pierce them! unlike other parts of the plant that you feel is alive! My soil is pure organic of the company BIO CANNA I have added zeolite in the middle. I think I made a mistake at the beginning, I added just above Enhancer and now I try to crap the mummy in the past week some members of the boys dieries urged me to stop watering as I did but I pointed to throw my ph because my soil is organic I think it is not necessary because it will spoil the whole situation !! I do not know what else I should do if someone has some advice to share thank you very much! My seeds are White Diesel Automatic 8-9 weeks till harvest !!!! i belive i got this problem https://marijuanacannabis.wordpress.com/2010/05/21/nutrient-deficiency-magnesium-mg/ 420!

So guyz thanks for the assist, at the moment i am with 10 plants, i lost 3 of them but i saved them from nuts lock. I flashed them all most all of them with 16-18 litres of water!! Now getting biggrer day per day hope will not have any more truble!! check them and if someone wanna add something it will help !