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The first salt pools were made in the 1930's though not very successful. It wasn't until 1959 a better system was made, and 1998 was the first with an enclosed cell and 2001 before a few states health departments approved their use.
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∙ 18y ago
Wiki User
∙ 13y agosince 2500 BC
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Why does saltwater pools need chlorine?
All pools need something to help keep it clean and safe. Chlorine has long been the sanitizer of choice. Saltwater is no different, as the charged cell breaks down Salt in the water into Chlorine.
How long have wastewater treatment plants been around?
Man made water pollution has been around as long as people have. Natural water pollution has been around even longer, and it is when salt water flows into fresh water, animals die in water, or volcanic gases mix with water.
How long have water clocks been around?
5,0000 years
How long have waterwheels been used?
water wheels have been around since the romans!
How long has the water we drink been around?
NOBODY REALLY KNOWS...........
How long have thunderstorms been around?
Thunderstorms have likely been around for as long as Earth has been cool enough to support liquid water in its atmosphere, which is more than 4 billion years.
What is a pool filter for?
A pool filter is there to remove particles of foreign matter from the pools water. Without a filter to remove this material it would not take long for the pools water to become cloudy and dangerous to the health of the swimmers.
Why Crocodile have been around for so long?
crocodiles have been around becasue they know how to survive they can survive both on land and water becasue they are amphibians.
How long has deforestaion been around?
how long has deforestation been around
How long has guns been around?
As long as guns have been around.
How long a shelf life does Perrier water have?
it's been around for 4,700million years,I wouldn't worry
How long has bottled water been around?
This is a debatable point, depending upon your point of view. From the Biblical point of view, water has been around since the second day of creation, when the waters of the earth were separated from the waters of the sky. The scientific community will hold a different viewpoint.
