Why do CO₂ levels rise after the lights turn off in a sealed grow room?Many commercial cultivators notice CO₂ climbing overnight, even when CO₂ injection is disabled. In this episode, Tyler Simmons explains why this happens, what plant respiration has to do with it, and why elevated nighttime CO₂ is usually normal in sealed environments.You'll also learn when high CO₂ readings may indicate a problem, what current research says about nighttime CO₂ in other crops, and how growers can use accumulated overnight CO₂ to delay morning CO₂ injection and improve efficiency.In this episode:- Why CO₂ increases during the dark cycle- Plant respiration vs. photosynthesis- Why sealed rooms accumulate CO₂ overnight- When elevated CO₂ should be investigated- What current research suggests- Using overnight CO₂ to reduce morning injectionSubscribe for more commercial cultivation education from Front Row Ag.Chapters00:00 The Overnight CO2 Anomaly00:20 Understanding Nighttime Plant Respiration00:42 Media and Substrate Contributions to Room Gas01:02 Auditing for Solenoid Leaks and Structural Gases01:28 Indoor Cultivation vs. Natural Dissipation01:50 What Academic Data Says About Nighttime Carbon Dioxide02:56 Practical Commercial Observations on Crop Potency and Growth03:24 The Morning Injection Delay Strategy03:48 Identifying Unexplained Biomass Decomposition