I just tested mine using RODI mixed to 1.023, using a refractometer and mostly salifert test kits.
PO4 maybe .001 (hard to tell)
KH - 7.2dkh
Ca - 390ppm
MG - 1170ppm
Ph - 8.1
No3 - 0ppm
Silicate - 2ppm ???!!!!
I'd like to think that the silicate reading is from my water (which tests off the chart), but I tested the RODI and it was .03 ppm without the salt. Maybe a TDS creap issue, but the makeup water was tested after 25 gallons was produced. I have been getting a lot of brown algae on the sides of the tank.