I am so upset today, I went outside and discovered FOUR dead fish in my koi pond. My big black koi (Blue), my big spotted koi (Zest), my big white koi (Falcor), and my big fantail, Georgina. Georgina was the only one left from my original batch of fish almost three years ago. Also, a few weeks ago, I lost Cleo, a huge Oranda. I hadn't lost a fish in a LONG TIME until Cleo! I don't know what could be causing this, but I can only think the ducks must be to blame, even if it's inadvertently, maybe their poo poisons them? As I said, I hadn't lost a fish in a LONG time, and Cleo died only a week or two after I got the ducks. I've only had the ducks for about two months. I'm so upset! I am afraid more fish will die. Does anyone know if this is their fault? I LOVE my ducks, but I love my fish, too!