The CarbonDoser Regulator is the most reliable CO2 regulator on the market. Instead of traditional needle valves controlling the flow rate, the CarbonDoser uses an electric solenoid that will open and close within a fraction of a second producing a single bubble. Super precise control with unmatched reliability.
The Rio Power CO2+ Reactor & Surface Skimmer is a great way to both introduce CO2 and skim the surface in a freshwater planted tank. There are versions that attach to the inside of the tank with a suctions cups and versions that attach with magnets.