Re:Sick horse

Despite the fact that he seemed to be doing so well yesterday our sea horse passed away during the night. I am completely baffled, because he was doing so well yesterday. I now find myself in a very bad situation. The marine life store that we went to ordered us two more sea horses that we will pick up tomorrow. Because of the condition our horses were in when we bought them last week we will not be doing business with them anymore. However, I want to pick up these sea horses and give them the best chance at survival. The catch is, they don’t even know what they ordered us. I am going to do all that you suggested for the circulation problem, but do I need to do anything to make sure that my living kellogg and our two new horses don’t get sick? As I said, I am terribly upset to be in this situation because I do not want to do something that will hurt any of these beautiful creatures. We researched this place thoroughly before shopping there, and went with it because it had a very LONG and good reputation for their marine life – I believe that seahorses must be the exception. Without knowing why our sea horse died, or what type we are getting, is there anything I can do to prepare? And do I need to find a new mate for our living Kellogg?