Need help with salt water set up please

[Daniel475]

ok so i got my 125 gallon fish tank all up and running its good to go.. so I got my 30 gallon just sittin here i was thinking of starting up a small salt water aquarium .. but I have no experience with salt water set ups.. so what all is involved? and what exactly do I need??? any information would be great.. so far all I have is tank stand heater and filter , and everyone of those peices were in my fresh water tank..
thanks alot
dan