I do not know much about sea horse. I have read your other posts and came to understand that you do not have a tank
. I suggest you start a new tank first. Do the whole thing, before thinking about the seahorse. You need to get your aquarium established first. The easiest way is to go to the section about setting up a new tank in swf.com. There is a step-by-step instructions and also the equipments that you need to start a new tank. Later after you get your tank established, then you can think about getting a seahorse
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As far as I know, keeping a seahorse is really hard because of its diet. I read on other post that if you want to keep sea horses, it will be nice if you can dedicate the whole tank for the sea horses. They have to be feed properly. But how exactly, I do not know. Sp maybe the others can help. But I think the others will agree that you need to establish a salt water tank first.
I hope that helps
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stupid_naso