For tanks between 55-99 gallons:
There are many smaller species of Cirrhilabrus that rival the beauty of their larger cousins. These include the Blue Sided Wrasse (C.cyanopleura), the Tricolor/Solor Wrasse (C.cyanopleura v.solarensis), and Lubbockââ"šÂ¬Ã¢"žÂ¢s wrasse (C.lubbocki). C.filamentosus, C.rubriventralis, and C.rubriprinnis are amongst the smallest Cirrhilabrus commonly available (attains mature size of 3 inches). However, their colors are not as dramatic as other species of the genus. Because of their smaller sizes, the aforementioned species can be kept in small aggregations of 1 male to 2-3 females in tanks as small as 55 gallons.
You may also opt to get a single larger Fairy Wrasse versus a small harem of these smaller species. Tanks over 55 gallon can accommodate all known Cirrhilabrus species, provided the tank is lightly stocked and has lots of swimming area.