cheap salt vs expensive

[honkey sauce]

i use Zeomag in my cal. reactor so i never have a mag. problem.
Personally I think the sodium base dosent change from marine to reef salt.
And marketers are banking in on the use of the word reef and pro.
They know people spend lots on there system and if the claim better results
reefers are willing to spend more.

I m sure they know people are lazey too , so the more you the less you know spend.
But I too need to know more on this subject