is used as is with all the minerals in it. All you need to do is dechlorinate it.
we are adding a salt mix that has 70+ minerals in very specific quantities. You want to start with very clean water so your final mix is Near Sea Water (NSW
My tap water reads anywhere from 185 to 215 ppm
of total disolved solids (TDS
). That's not to say that everything has been removed, just those eletrictally conductive metals which is really all a TDS
meter can test for.
I have a 5 -stage RODI
unit (Typhoon III from airwaterice.com). The first stage is a 10 micron sediment filter, followed by a 5 micron carbon filter, followed by a 1 micron carbon filter, then the RO
membrane. This setup makes each stage filter jsut the right amount so that the membrane gets rather pure water to begin with.
Using a TDS
meter with a RODI
filter is a must. Tap water pressure and temperature also affect how well a RODI
unit work. Pressure below 50psi and/or temperature below 55 degrees wil cause the unit to produce less water per hour. In that case a booster pump may be necessary.