Tips
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ChlorineChlorine has atomic number of 17 and symbolic sign as Cl. Chlorine can be spreadly found in form of salt or other compounds. It is halogen and presents in light green clear solution when it is in liquid state. In addition to chlorine, it is extremely hazardous to repiratory system. read more |
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Hard WaterCalcium carbonate is compound known as "limestone" and has been called by geologist "calcite". Limestone is generated from carbonate sedimentation of nature water sources. read more |
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Water quality criticismThe salesman was persuasive and persistent.read more |





