... when the scale gone. 2,Contains metal corrosion inhibitor 3,Super concentrated 4,Time saving Calci Gone is the most efficient ... tht system already clean.8, Before removing wastewater, Please neutralize Sodium Hydroxide or Soda ash to 7-8, this can guarantee ... inhibitor.3, Strongly Remove Slime, Urine,mineral deposits&cement scale4, Super Concentrated5, Time saving Comstar Calci Gone ...