frankly its hard to believe claims on some websites, and the lack of professional web design on the link you provided doesn't sit well with me.
Regardless, Are you having problems with the Oceanic salt? because it's best to stick to one brand for consistency, unless it's giving you problems.
I started with IO, but it didn't dissolve well, had whacky high alk
and low calcium and left me with a weird pH.
So I switched to Oceanic, which dissolves rapidly, has balanced calcium and alk
, and my pH is normal.
Some love their IO, others swear by Oceanic, while still others like Reef Crystals or another brand.