| Nothing strange about that, Steve. Koi are very sensitive to changes. If you turn off aeration at intervals, they get adjusted to it occurring. If it only occurs on rare occasion, it is frightening. If you have multiple filter lines and turn one off, the koi go on 'alert' due to the change in currents, etc. On Wednesday evenings my koi are often a bit skittish during the evening meal. That's the day the yard guys cut grass. They've been told not to use their blowers around the pond, but they usually do. Sometimes on Fridays the garbage pick-up does not occur until 6pm or so. I've learned not to feed until the rumbling, noisy truck has been past several minutes. When we have guests, I do not feed. The koi are not adjusted to having people around and form a protective school. At friends' homes where there is lots of movement around the pond, or noisy kids playing, the koi react quite differently. Sensitivity to vibrations is acute. If the neighbor behind me slams a side garage door closed, my fish have a bit of a startle. ...Earthquakes in Japan must be extremely frightening to the fish. |