After years of reefing (not the smoking kind, I get drug tested at work, come on!) I will tell you my favorite combination of shrimp is what we have now. A pair of common cleaner shrimp, a pair of peppermints, and a pair of blood (fire) cleaners. Everyone gets along great, and the personality of the common cleaners has made the blood shrimp much more "tame" then this species usually is. There is also a large banded coral shrimp in this tank, but he hangs out behind the rocks and grumbles about how nobody loves him.
Another added benefit is that paired shrimp in a healthy tank will always reproduce, and it makes a great food supply for SPS corals, and your fish.
We've actually had some shrimp that died of old age (thier life span is about 3-4 years in optimal conditions) and thats how we ended up with these at the present time. Great combo!
Also -- a tip for aquarist looking for cheap/efficient clean up crews...there is a species of shrimp known as glass shrimp that are available for DIRT CHEAP online. They are small and not colorful, but they clean the substrate and pick up a lot of debris no one else gets, and are not agressive at all. Best of all, they are CHEAP. You can get 36 of these guys delivered for about 15 bucks. Out of respect for SWF.com, write to me and I'll give you the link where to buy them. They are very hardy, they'll even live in hyposalinity, which makes them a great clean up addition to hospital/quarantine tanks. They come from the river deltas of the southeastern US, so varying salinity is not new to them.
Dave
mailto:dave@jfktower.com