Mlgfivehead

I don't think it's overwatering, it's because your rockwool blocks don't contain any nutrients to begin with, try next time soaking the blocks in water with fertiliser for a few hours beforehand. I had exactly the same problem. Nice Grow:+1::skin-tone-3:

reduce the distance to the lamp to 30cm= much more yield. They Are stretching too much. :pray::skin-tone-3: