Therese, I don't want to seem harsh, but have you gone to the seahorse sites linked in your previous posts?
There's a TON of information on both
www.syngnathid.org and
www.seahorse.org .
If you had in fact researched on either site, (or researched at all before getting these incredible creatures) you wouldn't be asking "what should I do" every day.
Not all seahorse fry will eat bbs. It depends on the species as to what foods work best, what conditions to keep the nursery tank at, are they pelagic, etc.
I asked in a previous post what species you had and you didn't answer. You stated 1 was bought online and 1 was wild caught.
Raising seahorse fry is a HIGHLY specialized thing. I've been doing it for a while. Each species has specific needs.
You've received some great general advice here on the board, but without knowing more, there's little any of us can do to help.
Again, I'm not trying to be mean or flame or anything, but IMO, your lack of basic info about the creatures you have reeks of irresponsibility.