My levels are perfect.. why?

[neoh]

I ran out of my calcium/mg supplement about two weeks ago, and didn't buy more as I was waiting on a 2 part doser. I got the doser, and checked my levels. I was going to assume everything was going to be out of wack, but it was quite the opposite.

Now, my tank is filled with corals to the point I'm running out of room for them. I have a clam, and a lot of lps.

However; my levels were this:

Ca: 460
Mg: 1300
Alk: 6
pH: 8.02
Temp: 79
Sal: .26
PO4: 0
NO3: 20

why are my levels still so high? Shouldn't my corals have depleted it all by now? I haven't done water change in two weeks, since my last dose. I'm going to cut my water changes down to once a month from twice a month.

I get very little algae, good growth and brilliant colors. That's what concerns me!

I know LPS doesn't need that much calcium, however; the clam should be absorbing some of them, as well as the larger pieces of lps I have. I do have primarily softies.

So what. Is this a fluke? Should I be preparing for the worst? Are my levels not where they are supposed to be? I mean, Mg could be higher, Cal can be lower, alk should be higher, pH should be a bit higher, but I mean.. lets face it.

What do you think?