Barry White should help. Maybe mix in Sade.
I've bred 7 species of seahorse. Separating them from birth, or even placing the father in the nursery tank to deliver seems to be the best if you can catch it. I am a late riser so this worked the best for me as most species seem to give birth at dawn.
Dropping the temp of the fry tank down to 68F or below helped significantly with bacterial infection.
My nurseries were round plastic buckets/tubs, with a central drain for a sump. They worked very well, even for the pelagic species. I'd move the baby seahorses every 2-3 days and clean out their bucket. Cleanliness is a huge part of the success.
I am not sure if gutloading the BBS is worth it for you. I seem to recall that they do not ingest anything for the fist 24-48 hours, but I might be mistaking on that.
There is a lot of writing on Seahorse.org. If you look up DanU's posts you can read what he did, and also how it developed over time.
Funny side story, when I was first breeding seahorses the Australian government thought it was scientifically impossible to breed seahorses in a closed aquarium. There was a person named David Warland who was actually arrested for having seahorse fry. At the time I was 20 and my kitchen was a full on nursery. Seahorse husbandry has come a long way in the last 20 years.
Keep us posted