What should I add to my 20L

[goldpuffer]

Here's a few shots of my 20g long reef. I started off with two anenemes a carpet and a bubble tip. I am planning on add a clam next. What else would you all suggest that I add. The lighting is PC 192 watts total. I don't want to do hard corals though. Heres a few pics.
Inside the tank.
5 blue leg crabs
6 red legs
3 emerald crabs
2 brittle statfish
5 turbo snails
3 conches
Pigmy angel
brown and white clown
25lbs live rock
15lbs live sand

 

[norway]

ZOO'S......
zenia, yellow polyps, green star polyps, mushrooms. all would do very well with your lighting or if you wanted to add another fish(but i would suggest no more than 3 for bioload reasons) you could get a goby/shrimp pair. i have a yellow watchman goby(1stpic) and a pistol shrimp. they dig caves and super defend all day long...very interesting. i also plan on getting a randall goby(2ndpic) and another pistol shrimp sooner or later.

 

[liverock27]

Tank looks great. I have a 20long setup also and I am loving it. The only thing that I would be careful of is that i had acouple emerald crabs in my tank and I caught them snipping at my zoos, so I got rid of them (big pain). Keep the pictures coming