Oki,
For lite salt water you might want to buy a sinking tip that you can attach to your floating line. They come about 16' long and will allow you to get down in the water column. I don't know anyone who has only one line for salt water striper fishing that is a floating line. They usually have a goto line of intermediate or full sink. As you already have a floating line, adding a sinking tip is a great way to give you that other option. Cost is cheap too.

jed