Semi-automatic CO2 injection system helps keep plants gorgeousIdeal for planted freshwater aquariums up to 200 gallonsEasy to assemble and use semi-automatic CO2 injection system This economical semi-automatic CO2 injection system is ideal for keeping plants lush and green in planted freshwater aquariums up to 200 gallons. Assembly is easy, and in no time your system will inject CO2 into your aquarium and automatically shut off at night when your plants start to take in oxygen. You need only monitor CO2 levels and add buffers when necessary. CO2 bottle not included. System includes: CO2 Pressure Regulator with solenoid, Timer, CO2 Glass Diffuser, Bubble Counter with built-in check valve, 20 feet of Silicone Tubing. Please click on "More Information" for system assembly instructions.

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