Moeller 50 Gallon Permanent Fuel Tank Moeller Marine has stocked quality marine fuel products for your below deck needs including the Moeller 50 gallon gas tank for over 25 years. They are the brand trusted by boaters and boat manufacturers alike for their commitment to research and developing the most innovative products. The Moeller 50 gallon fuel tank, unlike the traditional aluminum tanks, it is constructed with Moellers high-quality materials. These 50 gallon gas tanks are ethanol and biodi