I have a twenty gallon that I am dedicating to them. From what I have read, a dedicated tank with live rock, and keeping it a "comfortable" environment produces the best results.
I have had no luck finding a mated pair, I have secured two, one older, one younger that are currently housed together. It isn't ideal but at this point I am willing to take a shot. I have a ten gallon that I am going to use as a nursery and having dwarf seahorses, I am already hatching brine constantly.
Any other advice for setting up a workable breeding tank?