Red sea for nitrate, magnesium, pH
Hana for Calcium, Alk, Phos.
Have also used Red sea for Calcium, Alk and Phos and got similar results to the Hana Checker.
I did pick up an ICP anaylsis 4 pack and only used 1 so far. It was interesting to see that my Mag was reading lower on the red sea vs this test result (About 100ppm), though other measurements were similar.