Understanding the Appeal of an Unheated Setup Many beginners assume that "coldwater" means you need to keep your aquarium in a refrigerator, but that is a common misconception. In the hobby,coldwaterfishtankfish are simply species that thrive at standard room temperatures, typically between 60°F and 72°F (15°C to 22°C).
It is best to opt for the largesttankthat you can accommodate and afford asgoldfishgrow quickly and require lots of swimming space. One of the most common regrets many fishkeepers make is not choosing a big enoughtankto start with, as invariablygoldfishwill quickly outgrow many small 'startertanks'. It is also best to invest in a purpose built stand or cabinet for your fishtank as ...

Here's the thing:goldfishneed a lot more room than people realize. Anyone who tells you thatgoldfishcan be kept in a bowl or a small 5 gallon (19 liter)tankdoes not know what they are talking about. The cute littlegoldfishyou see in the store will grow to be between 6 and 12 inches long (15-30 centimeters), depending on the breed.

As we can see from the illustration, Cold Water Goldfish Tank Tiny Tanks has many fascinating aspects to explore.
The idealwatertemperature forgoldfishis between 68 to 74°F (20 to 23°C). However, they can live comfortably in temperatures from 50 to 80°F (10 to 26°C). It's important to maintain a consistent temperature in thetankor pond to avoid stress and health problems for thegoldfish. IscoldtapwaterOK forgoldfish?

I have this custom little acrylictankthat i put sand into with twogoldfish. No filter. They seem to be doing well. I do awaterchange twice month.