Now that you have got everything ready to go, go to your tank and hook it up. Below is the way I did mine, I did a few extra things on mine. I created a spill over bottle to avoid running the risk of the liquid hitting my tank. There are several out there that dont use it but I just feel safer with it. Your still going to hook up the 2 bottles but instead of running the lines to the spill over bottle it will go to your tank.
As you can see you are going to need 2 lengths of air line. 8 inches should be good enough but you can go longer. Bring both lines to a T adapter and from the T you are going to run the line to your tank. Here are some pictures of my set up under my tank stand. Notice the one 20oz bottle that I use for the capture of liquids.
From this point its up to you. I would recommend using an air stone on the end of the air line in the tank. This will help make more bubbles and allow more of the CO2 to get mixed in the water. When I had gravel as the substrate in my tank I took the draw tube from my UGF and cut a hole for my air line in the bottom of it and hooked up the air stone that way and let the bubbles go through my powerhead which really worked great. Almost all of the CO2 bubble were disovled. Since then I have switched to sand in the bottom of the tank and now that apporach wont work. I will leave this up to you. You have gotten this far and to be interested in this you have to be mechanically inclined.
My next project is going to be a DIY CO2 reactor. I am studying on different designs and about ready to give it whirl.
I hope you have found this tuturial helpful and useful. I will enclose my email address in case you wish to ask any questions
