too much chlorine

Chlorinating, maintaining the right chlorine levels,
chlorine problems. Dichlor, trichlor, cal hypo, bleach,
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flyfisher

too much chlorine

Postby flyfisher » Sun 11 Feb, 2007 08:30

The automatic chlorine feeder for my indoor pool was miscalibrated. I now have 8+ ppm of cl. After a shock treatment, it typically takes a week or more for cl. levels to drop to the point that we can use the pool. Sodium thiosulfate will neutralize the chlorine, but I can find no formula to let me know how much thio. to use. Can anyone help me?


dynamictiger
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Postby dynamictiger » Sun 11 Feb, 2007 17:09

Hi

0.5 kg per 100,000 litres destroys 1 mg/l.

HTH
pooluser

Postby pooluser » Mon 12 Feb, 2007 13:15

dynamictiger wrote:Hi

0.5 kg per 100,000 litres destroys 1 mg/l.

HTH


I read here 102 grams for 1 ppm / 100 000 liters using thiosulfate pentahydrate 100%. I guess your mileage may vary.

Also you may wish to buy thiosulfate from a camera supply store as opposed to a pool store, much less expensive.
dynamictiger
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Postby dynamictiger » Mon 12 Feb, 2007 15:45

That is one of the problems with thiosulphate the reaction is dependant on outside factors, such as pH and cyanuric as well as some unknown factors.

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