I was looking for salts to buy and I found "Saltworks" web site. I am not sure on what size of the salts I should use. Is there a better benefit from one or the other. Does anyone know what size is the best selling? I like the medium but I don't want to get huge:shocked2: ones that no one will want. Very new to this and just wondering where I should start. Any thoughts, Ideas, or, guidance would be great. Thank you, Suzan