I have had a line of white clouds going in a planted five
gallon water jug for many years (15 to 20 anyway). They usually get
Tetramin but when the population drops to three or four and they're
looking old I give an occasional mosquito larvae feeding and before
long some fry appear.
I've used both white clouds and bloodfins in such setups, as
they were reputed in Innes' Exotic Aquarium Fishes to be particularly
temperature tolerant. White clouds have worked the best.