Add Yahoo as a preferred source to see more of our stories on Google. It's a hot summer day and the sun is bright—perfect weather for taking a dip in your pool. You venture out to the backyard to ...

Algae blooms, peeling paint, and a host of fixes from hydrogen peroxide to nanobubblers have made it hard to diagnose what’s wrong with the Reflecting Pool—let alone how to clean up the mess. But the ...