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2. 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 ...

3. Childproofing - Wikipedia

   en.wikipedia.org/wiki/Childproofing

   A childproof fence. Childproofing (also called baby proofing) is the act of making an environment or object safe for children. This reduces risks to a level considered acceptable by a society, an institution, or to specific parents. Childproofing may include restriction of children to safe areas or preventing children from reaching unsafe areas.

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. Waterproofing - Wikipedia

   en.wikipedia.org/wiki/Waterproofing

   Waterproofing is the process of making an object, person or structure waterproof or water-resistant so that it remains relatively unaffected by water or resisting the ingress of water under specified conditions. Such items may be used in wet environments or underwater to specified depths. Water-resistant and waterproof often refer to resistance ...

6. Per- and polyfluoroalkyl substances - Wikipedia

   en.wikipedia.org/wiki/Per-_and_polyfluoroalkyl...

   In 2024, a worldwide study of 45,000 ground water samples found that 31% of samples contained levels of PFAS that were harmful to human health; these samples were taken from areas not near any obvious source of contamination. [66] Soil is also contaminated and the chemicals have been found in remote areas such as Antarctica. [67]

7. Urine-indicator dye - Wikipedia

   en.wikipedia.org/wiki/Urine-indicator_dye

   Urine-indicator dye. Urine-indicator dye is a mythical substance that is supposed to be able to react with urine to form a colored cloud in a swimming pool or hot tub, thus indicating the location of people who are urinating while they are in the water. [1] [2] A 2015 report from the National Swimming Pool Foundation called this "the most ...