There are small C02 tablets you can drop in water when feeding, they are cheap and apparently very effective.

http://www.basementlighting.com/Merc...e=1/PROD/NMSCO hope that helps.
MegaOctane12 Reviewed by MegaOctane12 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