Quote Originally Posted by jst300z
He says my system, as with others of the same class, remove Ca, Mg, Iron leaving a trace/if any amount of Sodium. So the salt in the water is a defunked myth.
Sodium is not the only salt you need to worry about. The term 'salt' encompasses more ionic substances than Sodium chloride. Did you ask what WAS left behind? For an ion-exchange to work, the ion has to exchange with SOMETHING... I'm guessing Potassium, which is a common one, and luckily it's better for plants than Na, but you still need to know what is there so you don't find yourself scratching your head later over a lockout.

You can try to get a MSDS for the chemicals in the thing...