So it is day 15 and all 19 have survived to this point which is good news considering that the mortality rate for these fish are high around Day 10. They have grown considerably and school together around the fake urchin.
@Janice recently got a pair from the previous batch and was asking about the feeding regime for these fry as they mature. Benggai's are notoriously picky eaters to begin with and the babies are no different. Everything I have read is that they will only eat live bbs for the first few weeks. I did read of one breeder who was able to get his eating frozen bbs after one day but I think that is rare. So what I have found is working for me is to have the bbs hatchery continuously releasing the bbs for the fry to eat as they need/want to. I have not enriched the brine shrimp as they are usually consumed before 24 hours of hatching and so they still have a yolk sac of sorts that provides nutrients to the babies. Everything Ive read otherwise is if you produce livee bbs in mass quantities for feeding over several days, they should be enriched with Selcon to provide the necessary nutrients for the babies. After about 3-4 weeks of live bbs, I start mixing frozen bbs and slowing down on how many eggs I add to the hatch n feed. This gets them a little hungry to try the frozen without starving them completly. This period is the hardest to get them converted to frozen and in my few experiences has taken a couple of weeks of being diligent in offering the mix on a steady basis. I also try introducing frozen cyclops in the mix but again in my experience they dont seem too attracted to this. Once they are starting to eat more frozen bbs than live, I completly cap off the bbs feeder so that they get hungry and only take the frozen. Again, this can be a long period as you need to make them hungry enough to take the frozen but not starve them and risk losing some. Once on the frozen bbs I then start adding shaved frozen mysis (the small stuff). This is usually around week 8 and it may take another week or two to get onto all frozen mysis.
Anyways, thats been my experience, thanks for asking. I hope this helps others who may find themselves in a similar situation.