I was skeptical when I ordered this regulator but I am very happy with my purchase. I've had many regulators in the $55-$175 range and this one compares to more expensive regulators. It is a two stage regulator and dual output which means you can supply CO2 to two aquariums or a very large aquarium with just one regulator. The needle valve was very precise. Adjusting the amount of bubbles is easy. Installation was easy and straightforward. I will use it for two separate aquariums. You have the option to purchase additional panels to power other aquariums you may have. I have a 20lb tank so it should take a while. The workmanship is solid and of good quality. Highly recommended if you are looking to upgrade your regulator or are looking to purchase your first regulator. You save a lot of money by buying a dual output regulator and then buying a single output regulator and CO2 tank. Really happy customer. 5 Stars! There aren't any cons yet, but I'll update if I find any cons. Many Thanks
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