TDS meters are a bit misleading and are really best used to discern a trend such as rising pollutants. When I mix RO water and add enough Equilibrium to reach 5 dGH my TDS reading is about 140 PPM Which would be nearly 10 dGH if it were just calcium that it was reading, but the meter just reads everything that is dissolved in the water. Fish waste, melted plant material etc. seems to make up most of it.
But back to your question, after adding minerals and raising the KH my water starts at about 200 PPM and at the end of the week it has risen in the tank to 450 PPM.
So 200 and 450 high tech tank, re-mineralised RO