See many dead koi under ice
My husband and I are heartbroken. I don't know what went wrong but we bought a new Farm Innovators deicer for the pond when we went on vacation because the smaller thermal ones always need to have the ice popped from the opening daily otherwise they sink. At any rate I think the fish were attracted to the heat of that unit & I could see one dead under the ice when we returned. I turned the unit off & it subsequently got frozen in the ice and now doesn't start. I've continued to keep an opening but now I can see many images under the ice and can smell the water every morning when I push an opening in the thermal unit. The ice is much too thick to remove the dead fish but now I think the water quality must be so poor that more are dying. I don't know what to do. We loved our koi and I always worked so hard to keep them safe over the winter.