Thermal layering of water does not usually occur until the pond (or lake) is over six feet deep.kirscp said:Here is a video of Koi under the ice during winter:
They don't lay on the bottom, they suspend themselves, and they do swim around.
As far as bringing "super cold" water to the bottom. All the pond water should be just about 32f, just above freezing. With only a few feet of water, there isn't going to be a temp change from the top to the bottom. If the water was colder, it isn't going to hurt the fish anyways. Koi can survive in cold water, as cold as water can get, before turning into ice.
You want to shut down your filters and clear out your pipes to protect them from ice, so they don't break. The only thing your fish need is air exchange and a few feet of water.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.
|Can algae be used for anything useful?||3|
|How can anything decay and have a build up of unwanted gases with water so cold?||12|
|If you could ask Santa for anything....||13|
|Algae - what (if anything) should I do?||14|
|Do I need anything under the underlayment to keep chipmunks out?||7|
|Water feature design - Am I missing anything?||4|
|Wanted filter,skimmer anything to help me||5|
|Fish died :( Is there anything obvious here? Warning: Pics||10|