Is table salt ok

[waterbear]

not to be difficult or argumentative, but the amount of iron in the YPS (Yellow Prussiate of Soda) is so minimal that although there is a slight chance of staining, it would be due to the salt not being stirred around to dissolve.

Sean,
As you are most likely aware, fiberglass pools are VERY prone to iron staining so the use of table salt in a fiberglass pool can definitely lead to stains with even just a small amount of iron in the water so I would be cautious with a fiberglass pool.
Plaster and vinyl are much less prone to metal stains unless the water chemistry is off.

When did the industry make the switch from table salt to water softener salt, btw (since most manufacturers of SWGs now recommend the use of water softener salt and caution against table salt)?