Join Date: Jan 2008
The Red Sea one that you mentioned is essentially DIY CO2 (sugar and yeast) in a fancy package.
You can just go with DIY CO2 and pay less. Alternatively, if you don't want the hassle of DIY CO2, you can go with pressurized CO2. While the initial investment is more, it is more economical in the long run, and is also less hassle.