"Wayne Sallee" wrote in message
link.net...
Most don't, some do.

It can react harmfully with (element, forget, too lazy to
look it up), and so the salt manufactures actualy leave
that element out.

Ozone is known to liberate free Iodine and Bromine from their respective
salts.
One test for the presence of ozone is to bubble the suspected ozone
containing
air through a potassium iodide solution to see if it displaces free iodine
from the salt.

I would think that charecteristic harmful for a reef tank.
Who leaves iodine and bromine out of their sea salt formulations?

Not one I'm using - I hope!
Thomas Bartkus