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2. The 7 Best Sale Items at Costco Right Now - AOL

   www.aol.com/7-costco-deals-dont-want-221402742.html

   $4 off in warehouse and online. Take a trip to France without leaving home with an assortment of French macarons. These bite-size treats would be a lovely addition to any dessert buffets this season.

3. Percent active chlorine - Wikipedia

   en.wikipedia.org/wiki/Percent_active_chlorine

   Percent active chlorine values have now virtually replaced the older system of chlorometric degrees: 1% active chlorine is equivalent to 3.16 °Cl. Taking the (reasonable) assumption that all active chlorine present in a liquid bleach is in the form of hypochlorite ions, 1% active chlorine is equivalent to 0.141 mol/kg ClO − (0.141 mol/L if ...

4. Salt water chlorination - Wikipedia

   en.wikipedia.org/wiki/Salt_water_chlorination

   Salt water chlorination is a process that uses dissolved salt (1000–4000 ppm or 1–4 g/L) for the chlorination of swimming pools and hot tubs.The chlorine generator (also known as salt cell, salt generator, salt chlorinator, or SWG) uses electrolysis in the presence of dissolved salt to produce chlorine gas or its dissolved forms, hypochlorous acid and sodium hypochlorite, which are already ...

5. Swimming pool sanitation - Wikipedia

   en.wikipedia.org/wiki/Swimming_pool_sanitation

   When any of these pool chemicals are used, it is very important to keep the pH of the pool in the range 7.2 to 7.8 – according to the Langelier Saturation Index, or 7.8 to 8.2 – according to the Hamilton Index; higher pH drastically reduces the sanitizing power of the chlorine due to reduced oxidation-reduction potential (ORP), while lower ...

6. I'm an American who visited Costco in Canada. It may look ...

   www.aol.com/news/im-american-visited-costco...

   Costco has more than 100 locations in Canada. On a recent trip there, I visited a Costco in Niagara Falls to see how it compared to US locations.

7. Shock chlorination - Wikipedia

   en.wikipedia.org/wiki/Shock_chlorination

   Shock chlorination is a process used in many swimming pools, water wells, springs, and other water sources to reduce the bacterial and algal residue in the water. Shock chlorination is performed by mixing a large amount of sodium hypochlorite, which can be in the form of a powder or a liquid such as chlorine bleach, into the water.