Multiple manifold blocks can be added to the UNS Pro Regulator to allow for CO2 injection into multiple planted aquariums. The manifold block consists of a detachable bubble counter, built-in check valve, and precise needle valve to lessen additional inline CO2 accessories. As a result, the combination of a single UNS Pro Regulator along with numerous manifold blocks creates a hassle-free and simplified planted aquarium CO2 injection system.