Since switching our LP Fireplace to a Pellet Stove we are using barely any gas and now are being hit with minimum usage charges, on top of a marked up price per gallon. We only have an propane stove now and it's only the rings that burn gas. We'd like top keep it since it works even in power outages, so I was wondering if it is feasible to return the 50 gal tank and use a grill tank, of which we have plenty! Thanks for any advice. G.