I acquired 11 of these fish through the BAP in June. They were placed in a ten-gallon tank, already cycled and with a lone bristle-nose catfish as its occupant. The tank did not have a heater, but the temperature never dropped much below 70. The surface of the water was covered in duckweed, which served as a great spot for the females to drop their eggs. About a week after I got them, several females had eggs on their fin and were busy depositing them. These developed well but never hatched. More eggs were laid almost every day after the first time, and they too never hatched. I then did a water change using RO water instead of regular tap water and about two weeks later I noticed that some eggs had hatched. The eggs have been hatching regularly since then, even though I have not used RO water in the regular water changes since then. The other factor that could have contributed to this is the warmer temperatures, which have kept the tank warmer. The eggs that did hatch took far longer than the 12 days that was mentioned in one book I read. This makes me think it was more of the temperature contributing to the hatches, rather than the soft water. The fry can be treated like killifish fry; they are raised easily on baby brine shrimp. I also found that putting spawning mops in the tank helped me retrieve the eggs more easily, since duckweed is very messy to sort eggs out of.
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