"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Pool filters work with your pool’s pump to circulate water and capture microscopic dirt and debris, and ...

We may earn revenue from the products available on this page and participate in affiliate programs. Learn More › Sand filters are commonly used for keeping your swimming pool’s water clean, but over ...

What’s better than having your own backyard swimming pool? How about having a pool that relies on an underground garden to filter the water rather than chlorine and other harsh chemicals? Alan Barlis, ...

Manta rays are elegantly shaped. They swim by flapping their fins like enormous wings, and their gills filter for plankton with the utmost precision. These creatures have now inspired human ...