Save yourself some trouble and follow these instructions, buy the co2 proof tubing it is harder and will not shrink like silicone tube, as this causes the tube to squeeze together when the co2 is off overnight, even with a check valve. No check valves are perfect unless you get one medical grade for iv use. But a standard check valve is fine. Ok so i would suggest when you initially are setting up your regulator to use a wood air stone, they produce fine bubbles and do not cause as much resistance as ceramic because they are larger. This makes adjustments easier to check the bubble count. Next i would follow the packaging instructions minus where it says to turn the second open valve (medium black knob) to where you want your bubble count. I would open that until your needle on the second gauge is about 1/4 past the 2 psi.(on that knob to actually turn it open your turn it in,clockwise,slowly. ) Then adjust your fine needle adjustment(the little tiny knob adjustment) the reason is when you open your solenoid there will be water in the line and there is not enough pressure to push the bubbles, so having pressure on this second gauge will solve this issue. You will get a perfect bubble count everytime. Thelast step is put a seperate timer on your co2 regulator from your lights. You only want co2 when your lights are on but it takes time to fill the tube when your solenoid first opens to fill the tubing and reach the tank. I set my co2 to turn on 30 minutes before my light this way theco2 is dispensing when the lights come on.
Rating: [5 of 5 Stars!]