Hi, Welcome to the site glad to have ya.
What kind of Anemone is it?? usually an Anemone isn't recommended until the tank is about a year or more established. Also what kind of Starfish is it that you have? Most starfish will starve in a 40g tank depends on which kind it is.
A few more questions
1. What are you using for water flow?
2. How are you mixing up saltwater and testing the Specific Gravity of your Salt water? Do you use RO
3. How big are the rocks 1.5 - 2 pounds per gallon is suggested. did you buy them live at the LFS