You should be able to sustain small plants in 200ppm nutrients byt thats impos with 200ppm tap water. Water wont feed, take the analysis above, mainly carbonates sodium and a few low elements of metal or whatever. None of that feeds or is absorbable, maybe the chlorides and a dew sulphates so you still talking 30 ppm max and im no water scientist so it could be a lot lower poss a few higher.
Ita just stupid to think of water as food and certainly not its full ppm as thats wrong chemistry and biology stuff.
Have you got a water report, post up if you want?