The PINPOINT ® CO 2 Regulator is now available. This is a high end regulator/solenoid engineered specifically for the aquarium hobby at an affordable price. PINPOINT ® CO 2 Regulator includes: – Electronic Non-stick Solenoid – Glass Bubble Counter – Silicone Tubing 20 feet (6 meters) – Adjustment Screwdriver Will fit standard or paintball CO 2 bottle (adapter is included) CO 2 regulator gauge shows remaining bottle volume/pressure Output pressure is automatically set to 40 psi +/- 3 LED indicator light to show energized solenoid Precision adjustable micro control valve 120 VAC North America (230 VAC Europe, Australia, UK, HK with proper prong configurations) 12 month warranty is the best in the industry For more details, see the Users Guide. Calcium Reactor Theory and Setup. This is an excellent Regulator/Solenoid for any hobbyist who is automating a calcium reactor or setting up a freshwater planted aquarium. Very quiet, reliable, non-stick operation. Precise needle valve to dispense exactly the flow desired. The PINPOINT ® CO 2 Regulator Solenoid is the Cadillac of regulators.