Some more info is needed.
How long has the tank been set up? anemones need well established and stable tanks.
What else are you hoping to house in the tank? Anemones occasionally will roam. They have the ability to kill many corals. In a smaller tank a raoming anemone can be a disaster.
I'm not familiar with your lighting, so I can't say for certain. Anemones are among the most light hungry creaturea available. I am uncertain if you have sufficient lighting.
I'm moving this to the nano forum so that you can get more help.