Lets hope the salinity is 1.025
As for the magnesium, 1100ppm is a pretty good number. You can try to raise it to about 1350ppm but it will take a lot of supplement.
I wouldn't worry about the pH test kit, your tank will likely hardly fluctuate except at night. With regular water changes it should be pretty stable.
Just concentrate on your list there and you should be on your way!
