Did you collect this hatch? Mine lay on a piece of clay pot and I remove it right before llights out on the night I know they're going to hatch. I set it up in a separate tank and put an air stone under it. The next morning after they've hatched, I add rotifers and the algae (Rotifer Diet from REEDS mariculture). I put TONS of rotifers in there and keep the water green with the Rotifer Diet until after meta. That way the roifers co-culture. I have some 4 days old fry right now...I haven't had to add any more rotifers yet - they're still very dense. I don't do BBS anymore...I start adding Otohime A around day 4 or 5 along with the rotifers, then eventually wean them to just Otohime (also available from REEDS).