These super peaceful guys with a little effort will reward you stunning colours but be careful of tank mates as they can fall prey to larger fish. They need low levels of nitrate less then 10, and you need a tight fitting lid as they can jump.
Feed them live food like daphnia.
Max size 1.5 inch
Temp 72-79F
PH 5.5 to 6.8
Hardness 0-5 dGH