rowater

Hi all, My tap water runs at around 400/450 TDS. No idea what that is, I do know though the water is very soft. So KH is 0 and GH is like 1. My RO System is supposed to be a very good one. It is commercial, made for shops. I don't think you can find it outside of europe, but it is the Blue Pure...

I have an easy line 300 osmosis ( RO) filter. I have used the device once, so it was bought new and I now measure a value of 25ppm, the normal tap water from the tap is 425 ppm. what can I do to get my osmosis water to 0ppm? And what would be the risk if i use this water?