Thanks for all the help so far! So I did an improvised DIY solution following the basis of the reefkeeping article. I used 1927ml of RO water, and mixed in 1/4 cup (73grams) of Salt... The salt was easy to measure with a measuring cup and I used another glass measuring cup to get 1900 ml of water, I used a syringe to add the final 27 mL of water so I'm fairly certain I was precise.
I did this mixture 3 times just to be certain I didn't screw up somewhere
Now, just to be sure when he says "Morton's Iodized Salt" he's talking about an American Brand name for table salt correct???
This mixture gives me the 3.65% ratio of salt to water I need to adjust to a 35 ppt reading on the refractometer. I took 3 readings off each batch, every reading of every batch was within .005 of 1.029 so I proceeded to adjust my refractometer to 35ppt or 1.026.
So, with all that done do you guys think I could be confident trusting the reading I'll take after supper?
Thanks and Cheers