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 Gas prices averaged $2.75 per gallon in July, which was the lowest average for the month since 2010. 2  Todayâs average gas prices are about 85 cents per gallon less than a year ago. 3  The national average has dropped about 14 cents per gallon since hitting a 2015 high of $2.80 on June 15.