I have a small pond, about a meter deep with some regular gold fishes in it, nothing fancy. The fishes look healthy, they have a really good color, they are active and they recently reproduced, so I have also some baby gold fish that I'm trying to give away.
I live in northern Italy where temperatures in winter often go down to -10 °C, water in a container above ground usually freezes for about 10cm from the surface.
I have means to not let the water freeze too much, in a way to always have some liquid water exposed to the air.
My question is: Do low temperatures affect the adult fish? What about the babys?
Fish health is my priority so if I need to get something special to ensure that my fishes are healty, I will have no problem getting it.