No anemone with a puffer.Puffers like to pick at stuff.Trigger might as well.In aggressive tanks nitrates usually run too high for an anemone as well,as the fish are messy eaters.
Do not mix anemones in one system,make sure you have proper lighting.{metal halides}
If you must get an anemone,consider a rock or tube anemone...they require less lighting,and are'nt as sensitive about water quality.