Or have you noticed how the walls of a fish tank sometimes turn green and slimy? These are all examples of algae—but there is a lot more to the algae story! On the right side of the cover, it is ...

A peaceful fish that should be kept alongside similarly non-aggressive tank mates. Also known as white-spotted goby, ...

That’s because these algae-loving, waste-clearing ‘janitors’ glide from side to side, clearing unwanted debris from your tank as they go. They’ll devour extra fish food, hoover up dead ...