allaboutfish
Aquarium Advice Addict
live aquaria is usually a good sight but sometimes is wrong but here is what it says (i dont agree with the 20 gallon minimum for skirts bc i think 29 is best)
Tropical Fish for Freshwater Aquariums: Black Skirt Tetra
Tropical Fish for Freshwater Aquariums: Red Minor Serpae Tetra
Tropical Fish for Freshwater Aquariums: Black Skirt Tetra
Tropical Fish for Freshwater Aquariums: Red Minor Serpae Tetra