ZRDR Aquarium Co2 Regulator DC electromagnetic Coil with Large Double Meter Display and Bubble Counter and Check Valve Plant Growth DIY…

Description

Product features: – made of hard aluminum alloy, sprayed on the surface and beautiful in appearance -12V DC quiet low temperature solenoid valve. Open, CO2 off, shutdown, CO2 cut off. Convenient for you to CO2 concentration timer. – bubble counter with check valve function, easy to read CO2 flow. Work with check valve function to prevent water flow back to CO2 kettle – high precision tuning, easy to achieve 1 bubble every 3 seconds – promote plant growth and activate light synthesis to stabilize