Ive had my pond for 2 years now. I had 10 koi at 1 point and the heron got all but 1! So I stocked the pond with goldfish and the 1 koi that was left had a baby. Now I have 1 koi that is about 1ft long and another that is 4-5inches. To this day after 2 years the large koi still goes crazy when it sees me. It starts darting around the pond and the other fish follow. Is there something I can do to prevent them from being so scared? Havent seen the heron in about 6 months now. I was thinking about going deeper, but will that help? The pond is about 2.5ft deep. Didnt see the point of going much deeper because I live in Southern California where even in the winter it DOESNT drop below 50 degrees.