My system has gone too far , approximately 250 gallon -
Nh3 - 0
no2 - 0
No3 - 239 - Checked with 3 different kits numerous times - including hanna, API all pointing above 200 number
Phosphate - 0.06
All other parameters are normal (Ph, Salinity, Alk, CA, Mg).
RODI water is pristine.
Switched...