New and completely ignorant!!!
I've seen other postings like this but I feel even less informed than others! We just moved into a home near a river and completely surrounded by trees. There is a koi pond in the back - has a plastic bottom and surrounding rocks. The sellers didn't tell us anything about it and we didn't know there were fish in it until the ice thawed. Lots of small goldfish and at least one large koi (or something). The bottom is completely filled with fallen leaves, there isn't a water feature yet for aeration and to keep it from being a mosquito breeding ground.
What should I do??? Clean the leaves out? Will the fish get upset? Am I supposed to be feeding them and what??? Help!!! I appreciate any suggestions.