I'm looking at adding CO2 to my 18x18x18" cube. My tank runs an external filter few by two bulkheads in the base of the tank so the CO2 must be added to the 12mm hose that runs from the filter back to the tank, so I guess I will need a reactor. I do want to go down the compressed cylinger route too.
What kits will do what I need?
What kits will do what I need?