If you crave salt, or are used to consuming a lot of it, there is a reason. Your cells are not getting enough sodium in the form of chloride into them. The trouble is, the table form of salt molecules are too big to enter into the cell, so it doesn't matter how much salt you eat, you still crave more. There is a nutritional supplement called cell salts or tissue salts that come in 12 different varieties. Natrum Mur. is the form of NaCl tissue salt that will enter the cell. They come in the brands "Schulessler" or "Hyland's."
You can also try "ConcenTrace" from sea water. These are naturally occurring trace minerals.
Both of these products you can get at the HFS.
After you balance the cells using the Natrum Mur., you probably won't need to rid yourself of the water. It will all take care of itself. Diruetics are dangerous as when they pull the water out of your tissues, they also pull out minerals.