 News Talk KBOI. Hi, this is Josh Zamzo, and between propane heaters, barbecue grills, and campers, lots of folks are coming to Zamzo's for propane. And if you're like me, sometimes you wait until the steaks are half-cooked to check the fill level on your tank, only to find out you're about to run out. And if you've been doing propane tank exchange, of course you want to use up all the propane in the tank before you turn it in for a full one.