I have a natural pond that is now 2 years old. 100' x 40' x 7' All rock lined with spots of algea growing here and there. Last weekend I had 5 females spawn and had eggs everywhere, a few days later there seemed to be hundreds if not thousands of fry everywhere. Up until last night we had seen them swimming in large groups aound the edges. This morning they all seem to be dead. I have spotted one live one still swimming around. What could have caused all of these fry to die. I have a fountian in the middle and an alita 80 pump running with 2 diffusers. I add dry bacteria 2x a month. This is my first spawn so I'm not really sure what the norm is.
Thanks for your help
Anthony
Rome, NY