Quote Originally Posted by stinkyattic
You don't actually have ventilation in your room. Add an exhaust.
Looks like calcium deficiency. How long have they been in those pots, and why are you adjusting your tap water so low? Cannabis grows just fine in ProMix at 6.7, and the pH of that mix drops over time anyway when the caco3 (lime) is used up. Ca def points to that as well.
Hey Stinky, Is this another problem Cal-Mag+ could help solve?