Northern Light first grow

The plant has had problems this week, it had brownish spots on the first two leaves, thinking it was a disease I pruned the two leaves and she has not grown anymore for 3 days. Afterwards all the leaves folded down and I thought she was sick and dying so I didn't take pictures. I found that I was actually giving her little water and added the two biobizz products. After a good watering the next day she already had straight leaves and was continuing to grow. I hope it continues to do so and that the harvest is not poor. The temperature went down and so I put a pile around the grow room and a fan inside, which I keep running for about ten minutes every hour. Do you think it belongs to tapping into the ground, how do I understand how often to give it water? I think a nice watering every 2/3 days is fine. Let me know guys! to next week!!