Best price & high quality water ... sterilization, water cleaning, bleaching, killing alga, deodorizationTechnical index :Grade\index value\index nameBest qualityFirst gradeQualifiedEffective content of chlorine % ≥90. ... sterilization, water cleaning, bleaching, killing alga, deodorizationTechnical index :Grade\index value\index nameBest qualityFirst gradeQualifiedEffective content of chlorine % ≥90 ...