how to lower the ppm of the res

linsys

Well-Known Member
Just add RO water... PPM is parts per million and represents the electronic conductivity of the water biased upon dissolved salts. If you use RO water which has a PPM of 0 you can lower you PPM by diluting the "mixture" there by decreasing the PPM.
 

Someguy15

Well-Known Member
If your tap water is decent (<200ppm) then tap is fine also... R.O. means u need to add cal-mag and other good stuff that gets stripped during R.O.
 
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