Cap Set is just the term I used to refer the Pop Bottle Caps, Fittings, and Tubing that I put together to use for DIY CO2
. All that's missing is the Bottles, Diffuser, and some extra tubing to connect the Cap Set to the Diffuser. If you take a look at the pics in the link it should make more sense. It will also give you a better idea of what you are actually building.
Basically you need either some empty pop or juice bottles. The number and size is dependant on the size of the tank that you want to inject CO2
into. In your case you'll probably want either 5-6 Two Liter Pop Bottles or 3 One Gallon Juice Bottles.
Drill at hole in the lids that is the appropriate size for the fittings or tubing that you will be using. If threading the tubing directly through the cap, you want the hole to be a bit smaller to create a better fit.
Attach the fittings or thread the tubing through the hole. If using fittings make sure the screw snug to create a good mechanical seal. Tubing can then be attached to the connector. For tubing it helps to cut the end at an angle to make threading it through the hole easier, then use an aquarium safe sealant around the tubing to make sure to get an air tight seal.
The tubing from all the bottles can be connected using airline connectors so that all the CO2
can be run through a single diffuser. Run tubing to your diffuser of choice.
I can get you directions for several different types of powered diffusers (reactors) if you need further help with that part as well.