Battered & bruised. Give her another week in 14 then next week its 10/14. Nature uses: Mass Flow (Barometric Pumping): This refers to the bulk movement of air through soil pores caused by pressure differences. Fluctuations in barometric pressure (high and low pressure fronts) and wind speed over the surface create these pressure differentials, which can force air in or out of the soil. This is how soil "breathes" so to speak. Barometric pressure fluctuations can cause day-to-day variations in gas emissions by a factor of 20 to 35 times, a dynamic response that highlights its importance in the overall carbon cycle. Indoor growers use: Negative pressure can replicate the effects of barometric pumping by creating pressure differentials that induce air to flow in and CO2 and nitrogen out in a controlled manner. Carbon dioxide is released by microorganisms when they eat sugars, when there is no mass flow in a cycle/system where microorganisms are releasing CO2 from eating sugars, the CO2 accumulates in the medium, leading to several significant effects: cut a long story short, the lack of mass flow prevents essential gas exchange, causing the waste product (CO2) to become a self-inhibiting factor that limits the microbial activity and can eventually kill the organisms. Increasing the amount of carbon in a soil increases its moisture retention, an often-overlooked detail that often ends up around the 4th week of flower, people wondering why hypoxia occurred. Around 40% of all the carbon captured is exuded into the soil to feed microorganisms and converted to chemical energy; CO2 accumulates. This is why it's required if you want to reuse the soil. CO2 is a very stable molecule, sitting at a "bottom of the potential energy well". A significant amount of energy is required to break its strong bonds and convert it into a higher-energy, more useful molecule (like a fuel). Converting CO2 back into fuels requires the same amount of energy released during its original combustion (due to the conservation of energy), which often makes the process energy-intensive and expensive. Therein lies the key, 90% of the air that enters the tent, enters through the rootzones, up and through the underside of plant canopy, air comes in but all the CO2 accumulates in bottom half of the tent due to its density. The exhaust linked to rh keeps a constant negative pressure that links to the rate of cellular respiration performed at night. Come morning the compensation point is upwards of 1500pmm by morning. 300 dollar grow light on its 15th grow. The real star of the show is the 14000btu Portable ac unit.