Instant Ocean parameters

I recently got some new Instant Ocean salt and didn't find a lot of information online about what it tests out at so I mixed up a batch and this is what I got,

1.026 or 35 ppt Ph 8.2 - 8.4, Ca 440, Alk 11, Mg 1140

The magnesium seems very low. (I tested it twice) If anyone else mixes up a batch and tests for magnesium, let me know what you get! These readings might not always be the same from bag to bag but I thought it would be good to put this out there.

 

Standard.

 

It sounds like from what I've read IO is notroriously low for magnesium. I retested after a week with the same water mixing in a mostly closed container with a heater and these are the results,

I had to add a little top of water because some had evaporated which could have accounted for some of the drops,

1.026, ph 8.1-8.2, kh 10-11, ca 420, mg 1130