Id say go with a 10 gallon with a sponge filter or just an air pump, feed them brine shrimp, you can get them cheap at basically any lfs. Tiny weird looking things but fry seem to love them.
i was fishing for bowfin in hamilton marsh NJ and caught a 15-16in male that had breeding colors so i started looking for the fry and found the cloud so i took a few. should i fill the tank all the way or leave it low?