WHEEEEEEEEEEEEEE -
Had to add my comment.....
My first aquarium and thus first fish was a 120 liter tank with two sub-tropical seahorses. You can definately be successful as a beginner with seahorses, but you really have to avoid the reef forums.
No offence there ...... but seahorse tanks are very different from your average reef tank setup.
Firstly seahorses dont like flow, as they are poor swimmers, so a flow rate of around 2x an hour is great. Secondly they dont like most tank mates, who bully them and out compete them for food. Next they dont like corals that sting, and seahorses are a bit stupid and hitch onto them.....
BUT! with a little foresight, i think you an be successfull with seahorses as a beginner...
A standard tank with a canister filter is usually enough filtration. The flow is low, but that is what seahorses want.
Some liverock is good too, as is some macro.
Then feeding is easy - for the past 4 years you have been able to get captive bred seahorses that eat frozen foods. And you can place the foods in a feeding bowl, and the seahorses line up to feed like dogs do around the bowl....
Salinity is not too critical either for seahorses who can live years in anything from 1.018 to 1.027 - provided the PH is ok and you dont have massive swings in temperature or salinity they are fine.
They are much more forgiving than some of the more popular fish......
You just gotta spend some time at a dedicated site, and things seem clear so quickly...