:lavalamp:Dont let anyone touch your tank except you. That means feedings too. When I went to a reef tank I had to tell the wife and kids not to feed, no matter how "hungry" the fish looked.
I say do what all the others say, but I would dose with the calcium asap, one dose. Then do a 20% water change asap, and let it settle a day and test again.
I would also look for another fish store, I dont think those guys are doing you any favors at all. They see dollar signs when you walk through the door.
My first store did that. I bought these corals from the guy and within a week they were looking dead, he said you need the better light, well he knew damn well what light I had. I bought a light online, he didnt like when I told him that, but now I drive right buy there and go to a new store, and this guy won't sell me certian things because he knows the lighting I have.
Anyway, I found this site same as you and these people seem to really know their stuff and help out for free. I need the butt-kissing emoticon now!!!!