A new tank goes through many changes in the first few months of being set up and those changes are what can affect the anemone. After about 6-9 months the tank has stabilized enough to keep them. These changes arent even the basic water parameters but underlying to them so there is no way to really rush things.
If you can I would return the nem and go from there. And yes, it will move whenever and wherever it wants, thats what they do until they find their happy spot.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.