Glad to see you are getting back into sw marty! I always thought it would be fun to set up a pico tank (coral & invert). Was a little shock you posted this considering that a pico is yet a whole new breed of tanks, but i think most if not all of what was said before is over and one with.
Anyways back to your tank. When I was looking at getting a pico i had my eyes on this set up from nanotuners.
cpr pico-c 3 gallon Seems like a good set up for the size. I little pricey but you know how it is in this hobby, you should never skimp. I think a pico will make a wonderful softy tank. Toadstool would be fine in there, but it might out grow its space which is why we frag. Star polyps would be awsome as well.
Now you got me going...lol. Well i can't wait to see this up and going. Keep us updated and make sure to start a user journel.