Drowning Fish

A few years ago we put a goldfish pond in our backyard. I bought the cheapest little goldfish I could find. I think they were $.19 a piece. I bought 4. They were getting really big and the 4 fish had turned into many. I loved going out to the pond and seeing all the different colors the babies were and seeing if I could spot any new ones. I have not been taking very good care of it this year and the water level was getting really low. I put the hose out there to fill it up. Later that night I was getting ready for bed and heard water running somewhere. I looked all around and could not figure out for the life of me where it was coming from. I finally just chalked it up to being the dishwasher running. I woke up at around 5:45 the next morning and still heard the water running and finally it dawns on me where this is coming from. I run outside and to my surprise my yard isn't flooded. Everything looked good still (except for my upcoming water bill I'm sure). The next day I was trying to get some of this very annoying plant out of the pond, when I discovered that the fish were dead. I drowned my fish.