It depends on the conditions in the water-butt. Goldfish are cold-water fish and can tolerate a wide range of temperatures, from 34°F to 90°F, but they do best in water between 65°F and 72°F. The water-butt should be large enough to provide the goldfish with enough space to swim around, and it should have a filter to keep the water clean. Goldfish also need oxygen to breathe, so the water-butt should have a bubbler or other way to aerate the water. If these conditions are met, goldfish can survive in water from an outside water-butt.
Here are some tips for keeping goldfish in a water-butt:
* Use a large water-butt, at least 30 gallons in volume.
* Provide a filter to keep the water clean.
* Aerate the water with a bubbler or other device.
* Maintain the water temperature between 65°F and 72°F.
* Feed the goldfish a high-quality diet, and feed them only as much as they can eat in a few minutes.
* Regularly monitor the water quality and adjust as necessary.
By following these tips, you can help your goldfish thrive in a water-butt.