CNET’s expert staff reviews and rates dozens of new products and services each month, building on more than a quarter century of expertise. Owning your own swimming pool is definitely a luxury.

There are also sensor-equipped systems that analyze the water on an ongoing basis – according to scientists at the University of South Australia, though, these setups tend to be complex and expensive.

A jump into Barton Springs Pool raises goosebumps and turns lips blue. That’s what 68-degree year-round water does to a body, right? Not so fast. Despite T-shirts that proclaim it, websites that tout ...