My Mum lives up in Montreal where it’s quite a bit colder than here and they still have snow on the ground. She has a pond with a couple Koi and goldfish and I was having a bit of debate as to when she should start feeding them. I understood one should wait until water is warmer, e.g. 50’s, and not below this temp. Am I wrong or is it possible for her to give small amounts when the water is in the high 30’s or low 40’s? My thinking is while I am sure the fish would likely food, their systems have not got up to speed yet to digest properly? Tks.