regulator

Have a co2 system running on a forty breeder heavily planted tank, lighting and co2 are on timer set to go on and off on a nine hour cycle... my problem is my lights are going off but the co2 continues to run, could it be the solenoid is "stuck open"??? Have tried unplugging the device to...

Long story short I got a most of a Red Sea pro kit on ebay for 80 bucks. Unfortunately for me the hose barb shaft that runs through the solenoid motor was broken in half. It requires more than just a new hose barb fitting. How I don't know. How do I use a different solenoid with the Red...