So I moved the Greissenger Goby to the new starfish tank along with the Tailspot Blenny so the only resident in the pico right now is a very small Sea Apple that I'm concerned about moving to the other tank because if it were to die, it would nuke the tank. I found these extremely vibrant strawberry crabs for quite a bargain and it gave me the idea to add maybe 2 of them to the pico and turn it into an exotic invert tank. I was also considering one of these small pink/orange filter feeding cucumbers which I've kept before and found them very easy to care for. I was also thinking about one of these very small carpet nems and tube worms which I know I can get a great deal on if I get them together. Of course I wouldn't add everything at the same time but it would essentially be a filter feeders tank without fish or corals. Here are some pics of everything except the apple which I already have.