I am always telling people this, so if you have heard it before, please pardon me...
The difference between the JBJ and the Milwaukee...
The JBJ has a FIXED working pressure. That is the biggest difference between the two. Fixed working pressure means there is no knob to ajust the PSI, the regulator does it automaticaly. This is a typical feature of a low pressure regulator. In my opinion, it makes the system safer. The Milwaukee is manual, so you have to ajust the PSI to whatever working pressure you want. What is the right working pressure? Good question.
The JBJ has a red light come on in the solenoid so you can tell when it's on. Nice little feature.
Both of these regulators include a needle valve, bubblecounter, built in check valve, and solenoid. The JBJ solenoid can be removed to put a manifold in its place. Milwaukee does NOT recommend removing ANY of the componants. So if you follow Milwaukees advice, you can not replace any parts that become defective amd you can not add a manifold for multiple tanks. The JBJ you can.
The Milwaukee is the cheapest regulator on the market, in every sense of the word. The JBJ regulator is priced a little higher. Both are a better value than any other regulator because they include the bubble counter and solenoid which normaly are additional. Where dis you get yours Justin?
The next thing you would need to decide is how you want to deliver the gas inside your aquarium...via a reactor, diffusor, whatever. A reactor is a device that mixes the gas with water for 100% absorbtion. A diffusor simply bubbles the gas into the water. But that is another whole topic.