But in your home tank, there's no bacteria to be found. You have to introduce it, and that's where a lot of goldfish owners slip up because you can't just buy a fish the same day you get your tank.

Goldfish tanks need space, good filtration ... which is full of practical tips and advice to help your pets live their best ...

Besides causing fiscal and environmental disasters there are other reasons you should keep that goldfish in its tank. More from Science Goldfish may look small and cute in your home, but in the ...

Photgraph by Matt Basista/USFWS Thinking about freeing your pet goldfish from their tank and letting them loose in a local pond or lake? Please don’t, begs the U.S. Fish and Wildlife Service ...