% salt versus SG

[rossb]

BCOrchidGuy wrote:

Marine salt buffers the pH at 8.3

Oh good point. Would it be safe to assume that the salt that the aquarium shops sell is the correct form of salt , ie not buffered? Could one use iodized salt?

BTW gold fish are a vastly underated fish. They continually do thing that impress me, and sometimes they just blow me away. They are still my favorites.