It will not raise the salt level...it will maintain it. When the salt water generator generates chlorine it breaks down the salt into chlorine and sodium hydroxide (lye). This is what causes the pH to rise. When you add muriatic acid (HCl) it neutralizes the lye and reforms the salt and also forms water. If you use dry acid this does not occur and you will be creating sufates in the water which can cause problems if they build up too high.

Why do you want to lower your salt levels....3200 ppm is perfect as far as most manufacturers of SWGs say. Lowering the salt concentration will cause the cell to have to work harder to generate chlorine and will shorten it's useful life! I actually run my salt levels closer to 3400 ppm for this very reason. In terms of cell life it is better to run the salt a bit higher than lower! The cell is not a cheap item to have to replace!