Co2 pads

Yes i have some and leave 'em. But those bags that produce thru organisms are cheaper overall.

wow thats cool didnt know they have those i was just going to put in a co2 tank with the whole setup. but this sounds easier for me

look up meat packing pads or floral pads, they are the same exact thing but you can get a case of 2000 meat pads for under $20 shipped amazon. they release co2 when they get wet, i.e. humidity = co2