for my 90 gallon, I have:
2 Cleaner Shrimp
4 Peppermint Shrimp
2 Fire Shrimp
4 Sexy Shrimp
I want some Harlequin shrimps, but they eat starfish.. my tank has a few Fromia Starfish
Coral Banded is also a VERY cool shrimp, but they are a hit or miss.. sometimes they will eat your fish..
keep your shrimps well fed and they will not have issues... Always feed your shrimps first before feeding corals. Shrimps are known to pull food out of anemone/corals, killing them as a result.