Io Or Io Pro Reef Salt?
 

can anyone justify price difference between IO AND IO PRO REEF SALT? thinking of switching from seachem to one of these since i'm finding seachem salt to be so inconsistent.

I have used all sorts of salts, and have never been able to justify the price difference on any of em. So I stick to IO. This is 15 years of "data" talking. ;)