Hello. A serious hydro grower will reverse osmosis filter that down to under 10ppm, starting with a blank canvas -- making the water a pure liquid medium to re-introduce only the good minerals.
Look,a ppm of 190 isnt bad at all,no need messin round with bottled water & surely dont use hard water micro,your well under the ppm where gh recomends using it.
More important is how the water smells,tastes & looks when drinking it,if it tastes good with no foul odor or cloudy appearance its good water.