Purple: Its def not the CO2, I have meters, and I have an automatic shutdown hooked up to it in case it ever gets too high and the pm meter fails. Im pretty sure it was over feeding, and WAAAY too high ppms/EC after mixing the nutes... I needed to water the mix down by 30-40% to get the reading down. I flushed them Sunday, now Im feeding lightly and hoping that it turns around... Any other info is appreciated