i would go to wal-mart and buy a timer for the light and run it on the same light cycle your use ing now there about 8 bucks as for the co2 i dont know sorry
good luck with the light thing hope this helps
smokesalot Reviewed by smokesalot on . what should i do I'm not goign to be around for a few days so should i let my light stay on for a longer amount of time and then shut it off for the day and a half that i'm not goign to be here or shoudl i shut it off now and leave it on for the amount of time i'm gone? also i heard that adding seltzer to the soil helps with the CO2 problem is this true? GrowinGreen23 Rating: 5