This article will attempt to cover all aspects of DIY CO2 systems
used on freshwater-planted aquaria. Insights intothe needs of
aquatic plants in relation to CO2, and how this relates to CO2
injection methods, will be described.It will examine mechanical
designs,and the biology of yeast relating to its ability andconditions
by which it producescarbon dioxide. Formulas foryeast
mixtures and somedetails on construction projects will also beprovided.