I got bad news for ya, its probably not good. For one 15ppm nitrates is NOT good, especially for an anemone. The require pristine stable water and a mature tank. How long has your tank been running? Your sig says 01/01/09, if thats the case, you shouldn't have anything in your tank at this point, much less 5 fish and an anemone. I'd take it back right now if your LFS will even take it back at this point. You shoud have stable water with less than 5ppm nitrates for a good 8 months before even attempting an anemone. Trust me, I've killed two already....