Congrats!
I have a mated pair of Reidi's. They breed every 15 days to the day! It does really depend on which horses you have but it is pretty difficult to raise fry. They are going to need live food like rotifers. Then when they are large enough BBS. I tried for a while but failed many times. I now have been giving my fry to rayjay over on aquariumpros.ca. He actually made a lot of progress with them and I believe the oldest fry are about 4-5 months old
There are some good threads over there on his setups in the Seahorse/pipefish forums. Seahorse.org has a ton of info as well.
Good luck!!