I had mine not quite that high, but it was reading around 600. Basically I did a water change, made sure that my ALK was within range and just waited it out for the calcium to go back to normal levels. During that time do not add any more calcium. Your mag is not that high, but usually people try to keep it a little lower. Also I would recommend getting your salinity back to a more normal range too.
With the calcium reading so high I would suggest getting the calcium and such tested by someone else. The reason it to make sure your test kit is reading correctly.
Found an article that might help. According to the article they recommend doing a water change to get it closer to normal parameters.
Chemistry And The Aquarium: Solving Calcium And Alkalinity Problems
Edited by WhiteReef - March 01 2012 at 11:15am