FZONE Aquarium CO2 Regulator DC Solenoid Bubble Counter and Check Valve Plant Grow DIY System W21.8 Side Open Cylinder

Dual Big Gauge. 1.6 inch big dual gauge easy to read your cylinder inner and working Pressure Updated Split-Type DC Solenoid. Newest 12 DC split-type solenoid instead AC models, more safe and stable. High Precision Structure. This regulator is designed for the aquarium. High precision fine-tuning easy for co2 to be 1 bubble in 3 seconds. Upgraded sealing material avoid any leak Bubble Counter and Tools Included. Together with bubble counter, you can read your co2 flow rate. Bubble counter with check valve function, stop water backflow to bottle. All installing tools included, make all goes easy Class 1 Manufacturing Technology. Made of hard aluminum alloy, surface spraying treated. Pressure knob and fine tuning knob with knurled