The new tank is the issue.for my newly started tank.
I agree your tank needs more and different types of bacteria in it, that takes time for that to grow and obviously the other water parameters must be met also to have success. Patience is a major factor in reefing and everybody makes mistakes, so do research and ask questions.The new tank is the issue.
Give the Anemone to someone with an established tank or back to the store.
Once your tank has been established for a year or so and you have proper lighting and water flow you can try again.