Dear friends:
I am going to move my koi indoors this winter, and I may not be able to do it until the outside pond water temperature drops to like 40F: I have to wait for the bio-filters to establish for the indoor tanks.
So I will likely face the problem: How can I move koi safely from 40F to 65F?
I am afraid that it would be too fast if I put the koi in a plastic bag with some 40F pond water and then just let the bag floating on the surface of 65F tank water, or it is ok for koi?
Thank you for your advice!