Every aquarium owner hopes for one thing. A perfectly clean tank that somehow takes care of itself. It sounds ideal, but ...

Microalgae are widely used in products such as biofuels, nutritional supplements and cosmetics. A newly-described type has been found in a home aquarium – and it could prove to be particularly useful.

Most of us know algae as that unwelcome visitor in an otherwise pristine aquarium. But some members of this mysterious group of mostly aquatic organisms have a hero’s role to play in clearing the ...