I think it was closed as it was sinking in to the ground!
Edit:
http://en.wikipedia.org/wiki/Fantaseas
Edit:
http://en.wikipedia.org/wiki/Fantaseas
I remember urban myths linking the closures to someone sticking razor blades down the slides. Didn't believe it then either.
The Dartford site actually made a good profit for the company but the mounting debts from other ventures ultimately caused the company to go under.
Sounds interesting, but its nowhere near as good as Action Park!
It was opened for one month in summer 1985 before it was closed at the order of the state's Advisory Board on Carnival Amusement Ride Safety, a highly unusual move at the time.[15] One worker told a local newspaper that "there were too many bloody noses and back injuries" from riders, and it was widely rumored, and reported in Weird NJ, that some of the test dummies sent down before it was opened had been dismembered.[1
They also had a looping water slide that was never opened to the public after it destroyed the test dummies sent down. A few staff had a go but most were injured....