This substance mysteriously appeared in my pool and attached
itself to rafts.� It's happened before but usually collects as a thick ring
inside the skimmer. It looks and feels almost like grease or oily soot.�
I'm in a rural area and there is no major road by my home. The pool was fine -
an hour later, this 'goop' was there.� The only thing I can think of is
that it is something from an airplane. There is an airport about 10 miles from
here and planes do come over rather low when they are landing or taking off. If you wish to contact me, scroll to bottom of page.��