Hi, I was having a similar problem, and started setting up extra tanks, and cycling the tanks it was easier to keep tank cleaner that way, and all the babies would go in there. I had a sponge filter going also, so the babies would’nt get sucked up in the filters. . I sold most of the seahorses to two local Fish stores in my area, after I was able to wean them from baby brine to Frozen Mysis. Then I separated all my males from my females. That put a stop to the breeding for a long time. I recently moved and started buying seahorses again, I got a new pair of seahorses, and the male now looks like he is pregnant. I have 3 females and only that one male. I plan to raise the frys but will separate or sell the male if need be. Raising frys are very time consuming and lots of work… But enjoyable if you love seahorses, like I do….. I’ve raised 9 Batches successfully. The first batch, unfortunately died, because I was all new to this and it caught me by surprise. So I hope all turns out well, for you,, and Good Luck with your babies.
I also keep a few jars of OCEAN NUTRITION, Instant Baby Brine Shrimp in a jar. there is enough in there for 4-6 weeks, and saves you time, until you can hatch some live brine shrimp… I got it at DR FOSTER AND SMITH