I wrote an article on what CO2 does to fish a while back.
Have a look at my post and if you have more questions let me know!
http://www.aquaticplantcentral.com/...cussions/51508-ph-co2-fish-why-they-gasp.html
Have a look at my post and if you have more questions let me know!
http://www.aquaticplantcentral.com/...cussions/51508-ph-co2-fish-why-they-gasp.html