To more directly answer your dKh question.
Nope icp essentially blasts everything that is put into it into individual atoms using an argon plasma (6000-10000 kelvin) and then measured by spectrometer (I think). So it lacks the ability to differentiate between an hydrogen atom bound to another hydrogen and an oxygen atom (water h2o) and a hydrogen bound to a carbon and three oxygen atom(bicarbonate HCO3-).
I understand the dkh now. I'm good with Salifert and keeping the number stable, whatever the actual number. I just figured I'd cross reference.
What does that salinity number transfer to? I don't know that I want to increase my salinity. As my calibrated refractometer, calibrated salinity probe, and glass bobber all read at least 34 ppt. I'm just wondering what thier number actually reads to the numbers we use. Or if there is another part to Na. Chloride? Mg is elevated, without dosing so maybe one higher, one part lower even out. Not sure.
Ironically I've been reading through the site on iodine. Seems many tests have came back zero, and read Randy's option on it all over. I was thinking of buying some from the pharmacy and getting a sailifert kit. At least to raise if off zero, but it seems it doesn't matter.
This tank has been up for 7 months, with all new top of the line equipment. I did dose fuel a few times, but I can't imagine what would be leaching. Maybe my marine pure blocks. al is slightly elevated as expected but in the green. Nothing metal in the tank. No clamps. External powerheads and external return pump. New heaters, ti ground probe, and my skimmer pump. ..Other then marine pure. Maybe elevated in the salt itself? So I'm wondering if it could cause a problem. I'm also wondering if my macro will take it up over time, as I know people dose it for plants.