need suggestions on 20g community

neons or cardinals...i like harlequin rasboras alot.. male guppies are always an option for color as long as you get 3-4+ of them to spread the nipping between them... maybe some glowfish can be another option
 
Glo-lite tetras:) IMO they are very pretty and they school too.
 
AquariaCentral.com