Dymax RX-123 DC CO2 Regulator with Solenoid

The Dymax RX-123 DC CO2 Regulator is a CO2 regulator with a low-heat DC solenoid for accurately controlling CO2 injection into freshwater and saltwater aquariums.

Key Features

• High accuracy
• Hand-tightened to the cylinder — no tools needed
• Lightweight, corrosion-resistant aluminium
• Low-heat DC solenoid, multi-directional

Good To Know

• Plants only use CO2 in light; switch it off at night (a solenoid on a timer does this automatically).
• Start with a low bubble rate and increase slowly over a few days while you watch the fish.
• After fitting, brush soapy water over every joint; bubbles mean a leak that needs re-tightening.
• Fit a check valve between the regulator and the tank.
• Keep CO2 cylinders upright, secured and away from heat and direct sun — never leave one in a hot car.