I purchased a 35.5 hunter and the cooking is fueled by CNG...this is going to be more of a day sailor for us and to be quite honest I don't know if we will be using that...anyway, theres a tank in place and the seller also gave me a full tank that's in my garage...I don't exactly like it there and am wondering what I should do with it....is there a demand for CNG or is there a place to recycle the gas?...thanks for any help...