I learned a lot about co2 last year from Dan with my failed cuttings. I think my problems were from the combination of compost, soluble mycorrhizae, and liquid seaweed. With other cuttings and plants, as well as seedlings, the liquid seaweed has done a great job of preventing fungus and dampening off. I have always watered seedlings with water and Maxicrop liquid seaweed, and I also mist seedlings with the seaweed solution. Never have a problem with dampening off. But it doesn't work very well on fig cuttings, however, when I was misting cuttings with seaweed solution I had no mold at all. Did have problems with co2.