chemical change
chemical change
Physical Change :)
In extreme freezing conditions, a shallow pond may freeze down to the bottom. If the pond is at least 18 inches deep, the surface may freeze down to a couple of inches.
If the water is likely to freeze, then I would definitely bring it indoors.
A pond de-ice is a small heater for the winter months that makes sure the water does not freeze. You can purchase them online at www.pondmerchant.com or at a dyi store in your area.
The ocean, in a pond only the top layer will freeze!
Pond De-icers help ponds that freeze often because of winter. If you do not remove the ice, the water could become harmful.
In most Canadian cities you can play pond hockey in the winter. In some places on the west coast, such as Vancouver and Victoria however, it is rare to get weather that is cold enough to allow ponds to freeze over thoroughly enough to have safe playing conditions for pond hockey.
By turning to ice
As long as your pond is at least 3 feet deep, you can let them in all winter but ensure that you have at least one area that does not freeze over. You can buy a spot heater at most hardware or pet supply stores. Our pond actually froze completely over last year and both goldfish and coi were fine. If your pond isn't more than 3 feet deep, I'd say water temps of 40 or below and I'd bring them inside
As long as your pond doesn't freeze over, you can let your fish stay in there year-round. If you aren't sure whether or not the pond will freeze over, you shouldn't take the risk- move the fish into an indoor aquarium until spring. There is also the option of buying a heater for your pond, to keep it from freezing, if you don't want to deal with the hassle of setting up an aquarium for the fish.
Generally just the top of a pond is frozen over so the animals are still alive in the water below, however, if the whole pond did happen to freeze over it would cut off the oxygen supply and the fish and other living things would die