Stop feeding pond fish when the water temperature reaches approximately 50°F (10°C). As pond water cools in the fall, koi and goldfish become less active, their metabolism slows, and they require less food.
Always use the pond water temperature, not the outside air temperature, to determine when to reduce or stop feeding.
How should I adjust feeding as the water cools?
- Above 60°F (15.6°C): Continue feeding an appropriate fish food, adjusting the amount based on fish activity and appetite.
- Between 50°F and 60°F (10°C–15.6°C): Switch to a cold-water fish food, such as Aquascape Premium Cold Water Fish Food. Reduce the amount and frequency of feeding as temperatures decrease.
- At approximately 50°F (10°C) or below: Stop feeding pond fish.
Why should I stop feeding fish in cold water?
Cold water slows the metabolism and digestive activity of koi and goldfish.
Continuing to feed fish when the water is too cold can result in uneaten food and excess waste, contributing to poor pond water quality.
Can I resume feeding if the weather warms up?
A brief warm day does not necessarily mean pond water has warmed enough for feeding.
Monitor the pond water temperature and resume feeding only when temperatures remain consistently above 50°F (10°C) and the fish are actively seeking food.
Important: Use a pond thermometer to monitor water temperature throughout the fall. Fish generally do not need supplemental feeding during the winter when water temperatures remain at or below 50°F (10°C).