drja Posted January 17, 2015 Report Share Posted January 17, 2015 Hi, I have just added chlorine to my pool and the floor of the pool has turned black. The chlorine that I used has an active ingredient of Calcium Hypochlorite 650g/kg. I have tested the PH and found it to be a little low, requiring some alkali to be added. Will raising the PH solve my problem. I do not have any water test results for metals etc. Can anybody help me. Please Quote Link to comment Share on other sites More sharing options...
chem geek Posted January 18, 2015 Report Share Posted January 18, 2015 The chlorine may have oxidized ferrous iron to ferric iron and produced black iron oxides (though usually they are reddish-black). Was the water from a well? If so, it may have had high iron content. Usually there is more metal staining when the pH is higher, but if you had a lot of metals in the water then staining can occur even at lower pH. Quote Link to comment Share on other sites More sharing options...
ronnyaderson Posted August 25, 2015 Report Share Posted August 25, 2015 I guess, there is a problem in water, is your pool water clean? if yes then It seems your cartridge is not working efficiently. Here are some simple steps that you should consider before adding chlorine in pool water Water Treatment And Testing For Swimming Pools Quote Link to comment Share on other sites More sharing options...
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