Algae blooms, peeling paint, and a host of fixes from hydrogen peroxide to nanobubblers have made it hard to diagnose what’s ...

A green pool is a sign that something has gone seriously wrong. This cleanup shows what happens when algae takes over and how it is dealt with properly. Step by step, the water starts to change. The ...

The federal government awarded a company owned by a Trump donor $1.7 million to install a new water cleaning system for the ...

As the Lincoln Reflecting Pool turned green with algae, officials are now using chemicals to fix it.

Nobody buys a pool so they can spend their weekends cleaning it. A robotic pool cleaner does the dirty work for you: it rolls along the bottom, scrubs off stuck-on grime, and filters out leaves, dirt, ...

As National Park Service crews try to clean the algae that turned the water bright green, another problem has developed: The ...