Characteristics: Bismuth is a brittle, silvery-green metal that has a low melting temperature and high specific gravity. Being both stable and non-toxic, bismuth is often used as a replacement for toxic metals such as antimony, cadmium, lead and mercury.
1 (Minimums vary by location and tank size, and can range from 100-1,500 gallons.) More often, the propane company charges a fee of anywhere from $25-$250 a year but averaging around $75-$130 annually, depending on local rates, the size of the tank and whether it's aboveground or underground.
1 Todayâs national average price of gas is $2.44 per gallon, which is 99 cents per gallon less than a year ago. 2  U.S. consumers should save more than $1 billion on gasoline over the holiday weekend compared to 2014, with many drivers saving about $15-$25 on every trip to the gas station. The national average price of gas in September was $2.34 per gallon, which was the lowest monthly average since February 2015. 2  By comparison, the average price of gas in September 2014 was $3.39 per gallon.