What more can I add?

[stokeds]

I was just wondering what more can I add to my 10 gal? I was thinking a nem, better clean up crew , new coral , or plants.

 

Fish

2 clowns

1 neon dotty back

 

inverts

1 halloween hermit

1 fighting conch

1 nassairus snail

 

coral

1 gsp large group

1 zoa small group

there is also a bunch of yellow sponges