I assume you plugged in the cord to open the valve? Those are easy to use first make sure you have CO² coming out of the tank. Next strip it back to the output line right out of the regulator.

There is a small LED light that burns with the power is on.
Zandor Reviewed by Zandor on . CO2 injection kit test whats up I just set up my co2 injection system and when I tested it I put the hose that comes right out of the gage directly into a cup of water and no bubbles came up. I have the system set to .3cuft/hr and the gage shows that the system is working. Is it not suppose to make bubbles or is there a problem? The system I purchased is the small system from new england hydroponics on ebay. Rating: 5