What type of lighting are you using, and are all the plants affected or just a certain strain? To my uneducated butt, it looks like a nutrient overdose...maybe potassium? Many times the plants that I've seen with the deep ridges on the leaves is a result of too much potassium. I use
Promix and composted manure 80/20 or 90/10 and haven't ever seen anything like that, but I only feed once a week with 20-20-20. I boost it with wood ashes when flowering, but that's about it.
As far as CO2 (Carbon Dioxide), plants typically use it only during photosynthesis, or when the lights are on. During dark periods, they actually use up O2 (Oxygen) and expel CO2...but at much lower levels compared to the O2 they generate during the lights on/photoperiod. I guess it could be possible to overdose them on CO2, especially if it was being pumped into the room when the lights are off (and made worse if the fans shut down, allowing it to increase it's concentration). Does any of this fit your situation?