I have always enjoyed neons, cardinals, black phantoms, and many of the other small tetras. So, when I set up my first tank after some years of absence, my first fish purchase was a trio of white clouds. Although not a tetra, they have similar size, dispositions and breeding characteristics.
White clouds are readily available from most pet, aquarium, and department stores.
Mine came from the latter because that's where I was when the notion struck me. Sexing is easy, as with many fish, the male shows more color in his fins and a slimmer body. I put the trio in one of those desk top aquariums that doesn't really provide a good home for fish. Instead, I fed them lightly, making sure they ate everything within a few minutes, and changed about one third to one half of the water once a week. The white clouds did fine and I soon noticed that they were spawning regularly.