Ideas for a 3 gal Pico

I've already got a Pico with some mushroom rocks, rics, boxer crab (cool little guy), and I'm going to add some zoas and a clown goby.

I love the little tanks, because you can showcase things that might disappear in a bigger tank. Also, water changes are a breeze. :D

I've actually got another Pico just sitting around and was wondering if anyone had any ideas for something cool to put in it. Preferably, something that moves, crab, lobster, shrimp, fish, etc. Non-reef safe is fine.

I was thinking about a harlequin shrimp, but I've heard they dirty up the water pretty quick.

Any input would be appreciated!
 
I had a pair of sexy shrimp in a 2.5 gallon nano for awhile. They're small and always moving, and were happy to eat flake or frozen food. They were hosting in a carribean flower anenome that I picked up from petco at the time, but will host in just about anything.
 
Check out this thread over at nano-reef. They have the best nano fish guide. We should put it in a sticky or something.

http://www.nano-reef.com/forums/index.php?showtopic=74703
 
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