Nutrient Vs Water PPM
I am new to Hydroponics and I have two newbie questions.
1) My water PPM is 300. I want nutrient PPM of 500. In such a case after adding the nutrient should I be aiming for a PPM of 800?
2) Should I use underground water (borewell) that has been softened by a water softening unit (ion exchange method of water softening) or Reverse Osmosis (RO) water? The underground water PPM is 300 PPM while the RO is The underground water after softening would have the calcium carbonate converted to sodium carbonate and calcium chloride. I am not sure what happens to the magnesium in the water (probably magnesium chloride).