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*Used to lower amount of free chlorineApplication:All Measurements in accompanying chart are based on 10,000 gallons.To Decrease: Add:1ppm 1.36oz.2ppm 2.72oz.3ppm 4.08oz.4ppm 5.44oz.5ppm 6.80oz.10ppm 13.6oz.*Mix Sodium Thiosulfate with warm water and pour directly over main drain - Reviews
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