Depending on the size of your tank, pressurized CO2 may be overkill. I would say if your tank is 30 gallons or under you just don't need it. Yeast setups work fine. For larger tanks if you are willing to drop $300 or so it is fantastic.
Two 1 GA desktops, a 5 gallon, a 2.5 gallon, a 10 gallon, a 20 gallon, a 25 gallon, and two 75 gallon tanks, all planted.
I am an expert on algae, so ask me if you have questions. I know how to grow it, just not how to get rid of it.