Cross Breeds - i want a couple of sea horses?

i want a couple of sea horses?

please can you tell me if i could keep a sea horse in a tank at home

yes, in the right tank set up with no other fishes... sea horses are a protected species through the CITIES act and as such they cannot be readily had. They are also aggressive and don't do well in smaller shallow tanks.
try here www.seahorse.org
http://homepage.sunrise.ch/mysunrise/hippo1/seahorses/keeping.htm
Yes, if you are experienced in keeping marine fish. You have to check daily salt levels, as well as all the pH and ammonia tests.
Yes if you have the right amount of salt levels and ph levels i have two salt water tanks and if the levels are off by just a tad bit they could die, you jut need the right skimming soultions and ph level testings everyday. Hope i helped
Of course - I have seen see horses in several pet shops. Make sure the tempratire of the water is correct, & other occupants of the tank are friendly to sea horses. good luck