So I have everything bought for a co2 system and it is coming in the mail but I am confused of what happens when I connect the solenoid to the light timer that I already have. The light timer I have has two plugs so i'm going to have one plugged in for the light and the other for the co2 system. So what's going to happen when I connect the co2 system via the solenoid to my light timer? Will it just start pushing co2 into my tank and how do you control how much goes in? Is there a way to set it so that only a certain amount of co2 is diffused into the water over an 8 hour period? Whats the deal with this? I'm confused because I feel like if I left the co2 on for 8 hours, which is what I have my timer set for, it would just pump all the co2 in the cylinder all into the tank over that 8 hours. I'm sure there's a way to set it so that only a certain amount goes in but how do you do it?