Dymax Co2 Professional Regulator RX-122 is made to provide constant regulation of Co2 for the aquarium. The regulator uses solid aluminum as its material that provides corrosion resistance against salt water. Besides being light in weight, the regulator also requires no tools for fastening onto the cylinder. Common leakage problem of the conservative regulators are often caused by high heat generated by its soleniod valve during operation. With the unique design of Dymax Co2 Professional Rgulator RX-122, the low energy consumed soleniod generate very low heat which will not caused any damage to any parts of the regulator and therefore it is safer and more durable to use compare to others in the market. The RX-122 is an ideal regulator for both freshwater and marine aquarium.