Hi,
For the first time in 14 years we decided to take our koi out of the pond and try overwintering them in our heated/insulated garage. We live in a Zone 4a and in previous years heated our pond. Our garage heater is set to 0C. The water temperature right now is about 12C. The water temperature in the pond before we took the koi out was below 10C and we stopped feeding them a few weeks ago. Now in the tub they seem to be swimming around, were as in the pond they were docile already. Does that mean we have to feed them again. The water temperature in the tub might go back down in the next couple of weeks since we are expecting our temperatures to go down as well. We understand that the koi develop a plug if you don't feed them for a while. If we start again now, would it hurt them? We do not have a filter system in the tub, only an aerator, since we thought the temperature in the garage would be around 0C or 5C. If the temperatures fluctuate between 12C and say 5C, do you feed when above 10C???