The first attempt to raise the fry of the Rohani barb was unsuccessful, so I collected a LOT more eggs and tried again. I tried a few different ways to incubate the eggs, but the end result was that the best method was to use a filtered incubator aquarium with subdued light. Just like I tried the first time. I think that the original batch of eggs were infertile. That is not uncommon with larger egg scatterers that have not laid eggs in a long time. Takes a while to work the old eggs out. I have had this happen with Congo tetras too.