Hi Hilde,
We all needed to learn this somewhere a long the line. You are correct, you will want to purchase a pressure regulator, hopefully one already set up for CO2 with the CGA 210 fitting. Also needed will be a needle valve that will control the bubble count, a check valve to prevent water from flowing from the tank into the regulator. Also you will need some sort of CO2 'delivery system' which gets the CO2 into the tank. It can be as simple as feeding the CO2 into the intake of a HOB filter (Aquaclear preferred with horizontal media), or a glass diffuser with a ceramic disc, or a in-line diffuser like Up-Aqua, or a reactor such as Red Sea 500 (in aquarium) or a Cerges or Rex Grigg reactor (external & in-line). Typically the delivery system determines the operation pressure (output pressure) we use: 20PSI is fine for feeding into a HOB filter intake but other delivery systems may require 30PSI or more to operate properly (that is why an adjustable output on the regulator is important). Also if you are running several aquariums off of one CO2 tank and regulator a higher output pressure may be required. The system in my office feeds three (3) aquariums so I use an output pressure of 30PSI feeding into GLA 3-way manifold (with needle valves and check valves built in). Each needle valve controls one tank.
GLA 3 way manifold with 3 needle valves and check valves - $79.99
Up Aqua in-line diffuser (Atomizer) for canister filter
Bump:
You see I now very little about regulators. Just know a flow regulator won't work.
PSI need to be around 50psi?
Bump:
So with the regulator WRCo2 in attachment I need this? Any parts I need to attach the solenoid?
Hi Hilde,
I have no idea what that is but I have never seen it used for an aquarium CO2 setup.