Is a heater required for a fish tank?

[Clowns are cool]

or is it optional
A GOLDFISH TANK

thanks

 

[Victor H]

goldfish are coldwater fish and dont require a heater unless you live in a very cold place. In fact if u put a heater it will shorten the life of the goldfish.

 

[penguin]

Not for a goldfish tank. They are cold water fish and do poorly in warmer water.

 

[allison]

Goldfish are one of the few aquarium trade fish that are true cold water. They do not need a heater. A heater would actually shorten their lifespan, as would putting a tropical fish in cold water. Almost (but not all, there are a few rare exceptions) all other fish you will see in the trade, including Bettas, need a heater, as well as a filter.

Even though Goldfish don't require heaters, they cannot live in unfiltered, cramped bowls!

Remember to cycle your tank before you put your goldfish in - read up on nitrogen cycle.

 

[Chris]

yes they are