Does anyone make a regulator that can run 3 separate co2 lines. I currently have a twenty gallon long planted and am looking at setting up another 20L as well as a 55 gal in my fish room. Can I purchase this or do I have to try and build my own?
There are some regulators that have multiple ports, but you can also achieve what you described with a single port regulator. You just need a splitter (in this case, an X splitter) as well as 3 needle valves in order to control the flow to each aquarium.