i am not so aggressive with nutrients and is reall...

Hello @jungpot! You're doing great with this scrog session! Well it's hard to say with the last pictures you provided, could you try to post a zoomed picture showing the yellowing? If you see burnt tips on leaves, curling-upward leaves, brows spots, or yellowing between the veins, then it's an excess of nutrients. If you're seeing fading-leaves, loosing their bright green and slowly turning to yellow, then it's a lack of nutrients. From what I see in the pictures, I'd go for a deficiency. In such case, we'll need better pictures to tell you what nutrient is involved. Hope this helps, keep up the great work, I'm really looking forward to your progression since this will be my next strain, keep us up-to-date and happy growing!