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In the sequel the Ghostbusters discover a river of pink slime underneath Manhattan.
The slime reacts to emotions, positive or negative, and can therefore also be used for good or bad.

Initially I thought the movie's villain, Vigo the Carpathian, was somehow responsible for the slime's creation, but because of it's 'neutral' characteristics I was wondering whether it had a different origin.

My Question:

• Was Vigo behind the creation of the pink slime or did it come from somewhere/someone else?

^[Source]

In the sequel the Ghostbusters discover a river of pink slime underneath Manhattan.
The slime reacts to emotions, positive or negative, and can therefore be used for good or bad.

Initially I thought the movie's villain, Vigo the Carpathian, was somehow responsible for the slime's creation, but because of it's 'neutral' characteristics I was wondering whether it had a different origin.

My Question:

• Was Vigo behind the creation of the pink slime or did it come from somewhere/someone else?