Hey yall, first time posting. I went to add a gallon of chlorine to my pool that I purchased from a pretty reputable pool store (nathans pool supply) which I've been buying chlorine from years. And not paying attention to the liquid coming out until it was too late. I noticed it was pretty dark in color and instantly thought the chlorine company (HASA sani-clor) accidentally put acid in it by mistake. I went to smell it and it smells like 2 stroke fuel. I looked inside the jug and saw it definitely looked like oil had been in there. Then looked at the pool and saw the tell tale sign of oil by the rainbow swirl like coloring on the top of the water. I would guess that a customer with the jug before had stored oil in before returning it to the chlorine company and the chlorine company didnt wash it out or notice it before refilling it and sending it to the pool store. I will go in the morning to nathans and see what they say. Can I run my sand filter still? Who's liable for any damage? And info will be greatly appreciated.