Do you keep the lights on all the time, or turn them on just when you want to sit out by the pond at night?
If so, does it effect the fish in any way if it's dark, and then you pop on the lights all of a sudden?
Preston, at least your pond looks like a POND. Mine is also 15' long. But, due to space constraints, it's only 3' wide. My pond looks more like a BOWLING ALLEY!