I'm new to CO2. I've upgraded my lighting, started dosing Green Leaf Aquarium dry ferts, and I feel like all I really need now is pressurized CO2 to maintain a stable set up. I have a buddy that pulled the trigger on one of GLA's CO2 set ups and it's working wonders. I'd like to purchase mine off their site and I'm just wondering what the differences are. There's so many different set ups and modifications. I'd like to use it for a 55gal and maybe attach a manifold for use with another tank in the future. Any help deciphering what the best GLA system is would be awesome.