So far so good, but what about shrimp?

[cq28]

So far so good. I have the 20 gal. tank up and running. I finally got two clowns in there and they are looking good. My next question is this...how would this idea of live stock sound? I'm interested in two shrimp, but not sure if it would be too much for the amount of space I have.
10 Snails
5 Hermit Crabs (Small)
2 Clowns (I bought them as Percula, but I'm not sure I'll post a shot tomorrow.)
Future Friends
6 Line Wrasse
Yellow Watchman Goby (most likely, but still up in the air for the kind of goby)
Zoas and Polyps. Probably 2 kinds of zoas and 1 star polyp (I figure to cover a rock for each)

Big question...I hear the cleaner shrimp is a good vaccum, but I'm interested in the red blood shrimp for the beautiful red color. CouldI get two, or should I only get one? And which one?

Thanks again, Clem

[flame]

Care Level: Easy
Tank Conditions: 72-78