hey jamie ,
look into cal-mag as r/o water has been strippd of all calcuim -n- magnesium or you'll have probs.

peace
crispi
xcrispi Reviewed by xcrispi on . R / O Water Question??? Well after using tap water for close to a month we are changing water today after work and picking up r/o water and needed to know if we needed to add anything to it , to make up for it not being tap water at this ponit,, other than G/H Part 3 that is>???? Jamie Rating: 5