Quote:
Originally Posted by gookaluda
We had baby koi outside and the water froze the surface. We would go out every morning and afternoon and break a good junk of it open. Never used a heater and never had a problem.
The only concern I would have, is if the fish are sold indoors in a heated environment and then placed outside in this weather, it might shock them.
*45 is not that bad...I would be more concerned with under *40
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You know, we consistently read in pond articles not to break the ice (or do it gently) as it can injure/kill the fish via shock waves. I've never seen any scientific evidence for this, however. I assume all your fish lived?