I have fished the acre pond a couple of times recently. I normally fish in the evening, the other night I went there a little earlier than normal, happened to cast out towards the fountain, got a bite. Threw out again, another bite. This went on for about a half hour the it just stopped. Went back last night, same thing.
So now I have a theory, they are hanging around there during the day, then as evening arrives they start moving around. Got to go back now and test this theory out more.