Ok...I would love to create a heavily planted tank with just a few fish in it. I know that c02 is very important in this process. I saw this product in the Pet Warehouse magazine....I cant remember the name of it now. But it is some kind of deveice that creates good amounts of Co2 in the tank...but with out the bulky tanks, and there is nothing to refill except for some kind of small cartrige. Does anyone know what Im talking about? If so...does it work as well? I believe it cost about 150 dollars as opposed to the 300 of the Co2 tank. I'll try to find the magazine and get the name of the product. THANKS!