User blog comment:Darkcloud1111/Son of Neptune Chapter Two Video Discussion/@comment-4339150-20110824003320/@comment-3146930-20110824004501

Percy used the water from the river and dragged them under. The Gorgons were no longer connected to the Earth so Gaea couldnt reform them. As far as Percy's curse being washed away, I dont have any explanation besides "A goddess did it."