Winter Care for a Small 65-Gallon Pond with Goldfish

Overwintering a 65-Gallon Pond: Fish In or Out?

A 65-gallon pond is very small for winter. The decision depends on your climate zone and minimum winter temperatures.

If You Get Below 20°F Regularly

• Bring fish indoors to a 30+ gallon tank with filter.
• Move hardy plants (lilies) to a cool, dark, damp place (garage, basement) in pots.
• Tropical floaters (hyacinth, lettuce) won't survive—compost them.

If You Stay Above 20°F (Zone 8+)

• Fish may survive with a de-icer and aeration.
• But 65 gallons freezes fast—risk is high.
• Better: use a stock tank heater + air stone.

Resources

• Overwintering Aquatic Plants
• Winter Pond Care

Bottom line: Small ponds = high risk. When in doubt, bring fish in.