I found this link to be helpful, if you want to be sure about the gender. Again, I love the way they look in your tank
Tanks: 30 gal community and 10 gal shrimp/community
Guppy - Endler mixed fry ranging in age from days
old to 1 month old.
Each group will include 20 ...
Complete custom-made aquarium system for home,
office, or business location. This gently used