what to add?

[kiddiedoc]

I have a 55g tank set up for greater then 18 months. I have a puffer, 1 clown, cleaner shrimp x 2, 1 lionfish, sea urchin. I would like to add 1 fish. What would you advise? Will be advancing to a larger tank in the near future. Thanks

 

[exile415]

whaT kinda puffer ? i'm suprised the lion or the puffer didn't eat the shrimp

 

[cartman101]

what kind of lion do you have? what puffer do you have?