I have three different air purifiers... which should I use?

I have a very small aerogarden hydro grow going. The girls(hopefully) seem in decent shape so far, but I'm a noob and it's just ten days in. Even though it's just ten days, it seems like the growth rate has slowed a lot over the last 4-5 days.. One plant has has drooping and curled leaves. I know my ventilation is the best and I don't currently have a fan blowing on them. I have three different air purifier unit:

1)Holmes HAP-293 http://www.belowcostappliances.com/air-cleaners/hap-293.html
2)Honeywell HFD-110 http://www.iallergy.com/product682/product_info.html
3)Ionic Pro Turbo http://www.amazon.com/Ionic-90IP01RF01-Turbo-Room-Purifier/dp/B000H0RZB0

I understand that co2 is very good for plant growth. How do these types of units I have effect co2? Which of these units is harmful or helpful to plants? The Holmes has an activated carbon filter. I'm not really worried about smell though, just producing air quality that benefits the plants. I have read different info here and there and it's confusing as to whether or not any of these machines, especially the ones that release ions and produce ozone, are great for plants or a detriment. What is the most important thing right now, simply putting a fan on them, using on of these units, somehow creating co2, adjusting temp of water in res(it is chill water, how could I warm it if it's necessary), or use a humidity dome?

The Holmes is the only one that will have an effect on the plants odor - and barely. The other two might provide a bit of circulation but will not hurt/help your plants in any other way - will not remove the stench either.

So would the Honeywell only be good for circulation since blows like a fan? What are opinions as far as ionizers/ozone producers and their effect on mj plants? I have read some say they really help the health and and growth and others say don't put them near plants.

ionizers are different than ozone generators, don't know much about ionizers but ozone generators work great,just don't put it in the room w/ your plants,they go into the exhaust & should not be used in a room you occupy because in high concentrations, ozone is bad for you