Yea...thats kind of how a friend of mine did it but a few of his sea horses still got pulled in even with a thick layer of sponge/filter floss covering the intake....
Thank you for your concern...I have actually had them before. I own 2 brine hatheries and plenty of nauplii for them....The only thing I dont have is a small enough sponge filter since I threw my last one away....but truth be told, I hated using a sponge filter since it isnt true...