This is ok. There's about a 2 hour lag between the DC and the actual levels so if you have the CO2 come on 2 hours before the lights come on with this set-up you should be good. You can turn the CO2 off maybe 4 hours before the lights are scheduled to turn off to let the plants consume it up while the lights are on.Also - the drop checker right before Co2 goes on is greeny/blue. When Co2 goes on then it takes around 4hrs to get light green. Could that be an issue?