My 29g tank is cycled and after I add my remora skimmer (in the mail) I 'll order my seahorses. First off I suggest you go to
www.seahorses.org & read thru all the post than post some of your own questions. They will recommend captive bred seahorses from flyingfish express & oceanrider, they guarantee live arrival & "certified free" of marine parasites. Also they are guaranted to eat
frozen mysis shrimp because they are captive bred. I have 30lbs of lr w/ 2" sand bed, penquin 170 filter & powercompact smartlight 65w for some soft corals that I will add in a few months when the tank is more stable. I currently have a clean up crew in action which includes 10 nassarius snails, 5 astrea snails, 1 fighting conch & 2
pepermint shrimp. The recommended tank size is 20g or bigger but some people on the board have smaller, remember that the smaller the tank the quicker things can get out of hand and w/ seahorse's that's not good. This is my 2nd tank, first one is 75g fowlr & a bunch of inverts, so I decided to venture into the world of seahorses. Good luck & read a lot.

Mike