Goldfish Tank Setup: Cycling your goldfish tank

Cartoon of a goldfish tank surrounded by arrows representing the nitrogen cycle

So you’ve decided to get a pet goldfish, you’ve bought a suitable tank, a large enough filter, and maybe some food, plants and decorations… all you have to do now is rush down to the pet shop and pick out your new fish, right? Wrong! There’s one more very important step to goldfish tank setup … Read more

Goldfish water temperature: What temperature should goldfish water be?

Cartoon drawing of a thermometer

In this article, we look at goldfish water temperature. What temperature should goldfish water be? And how does temperature affect your fish? Goldfish are hardy fish that can survive a wide range of water conditions. This includes very cold and quite warm water. However, there are still some temperatures that are better for goldfish than … Read more

Do Goldfish Really Have a 3 Second Memory? The Truth Behind the Myth

Cartoon of a goldfish with a thought bubble showing it struggling to remember where it left its keys

MYTH: Goldfish memory spans are just three seconds long FACT: Goldfish can remember things for months! Most goldfish keepers will have heard the “fact” that goldfish memory spans are just three seconds long – but is it true? Is the memory of goldfish really that short? The answer is a very definite no! Scientists have proven … Read more

About The Goldfish Tank

The Goldfish Tank is one of the world’s leading goldfish care websites.  Our experts have helped over 5 million people care for their goldfish and our advice has been featured everywhere from BuzzFeed to Smithsonian Magazine, Wikipedia to academic articles. Below, you can find out more about the people who research and write the articles you’ll find on The Goldfish Tank. … Read more