It can be tough times in winter if you are a warm blooded mammal. However if you are a fish and the temperature drops in your pond, and you are used to these temperature drops, then all that will happen is your metabolism will slow to an almost stop. This slowing of activity does not have any detrimental effect on the fish’s health, it just means that the fish will be less active during cold weather and so will need feeding less.

While we may have to rely on heat sources to keep us warm we can be safe in the knowledge that the fish at the bottom of our pond will be safe and well until the weather warms a little over the next couple of months. As long as your filtration system is working and as long as you make sure that your pond does not completely freeze over, your fish will be back to their usual activity levels come spring. It always worth giving them a check over to make sure that they have come through the cold weather snap unscathed but they are less likely to show as many ill effects as humans would do if exposed to freezing conditions.