A Terrible Graph

I was looking for a particular brand of melting salt when I came across this webpage.  The graph below is incomprehensible.

I'm not exactly sure what it shows except that Safer Than Salt has higher numbers than Others at 10, 20, 30, and 60 minutes.  Is this the number of fluid ounces melted by a container of salt on the y-axis?  Perhaps it's the number of square feet of ground covered in 1 inch of snow that gets melted...who knows.  This is why it is very important to label your axes.