Aggressive Flame Angel

Well, it's been 2 weeks since I added the clown fish and it seems like everything is getting along. The flame angel will occasionally challenge the clown, but the clown is not backing down. I've been thinking about buying a sea anemone. Any suggestions? I've also heard that an anemone could sting my other corals and that it may tend to move around in the tank quite a bit. Should I get one?
 
Make sure you research best species and proper care for anemones; millions have died in tanks without the correct lighting/water movement, etc.
 
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