Quicksilver Fuel Tanks.Quicksilver fuel tanks are available in either 12 litre or 20 litre sizes and come with quick release fuel connectors. The Quicksilver fuel lines suitable for the quick release fuel tanks are available in 12ft or 8ft standard lengths or longer by request. Having a spare fuel tank, ready to connect is a great safety feature when out at sea or on a river. Remember to use Quickare fuel stabiliser in unleaded fuel, as research suggest that unleaded fuel goes off after about 3 weeks in a fuel can or fuel tank.