Green Gelato Auto in reused soil

Plant grew a lot in the last few weeks, smell is getting stronger as well. She smells peppery, earthy. I had to flush the medium since she kept clawing and showing more nitrogen toxicity symptoms. Right after the flush she bounced back (leaves straightened out, no signs of overwatering) which made me very happy. After the flush i am starting to use an organic fertilizer used for tomato plants based on kelp. Will start with 5ml/l, this fertilizer is almost impossible to overdose since it works slowly. Am a bit worried because i have no airflow in the tent and no induct fans at the moment. Am getting a small fan for in tent air circulation at the end of the month hope i dont get mould attack since i have high humidity in the room 60%+, it drops during the night since i open the window and low temperature sucks all humidity outside but in a few hours my room gets the humidity from the rest of the apartment back, so i need to keep venting and its a bit annoying. The plant is very dense and i already cut a few fan leaves to expose some smaller bud sites... i wonder when will i do some stronger defoliation but i can still wait, buds are in the early stage.