| In every pond I have seen, there are quiet areas where the koi gather when resting. Your pond may be different, but I doubt it.
BTW, if you do alter the currents, you should do it consistently... every evening. Koi do not like changes in their environment. They will be disturbed by the change at first. Once they learn that it happens every day at the same time, or as it gets dark, they will adjust. Changing the currents only sometimes and at different times (especially in relation to the light)will be very disturbing to the koi, increasing the release of the 'fear hormones', etc. Regularity and consistency are important in most things koi. |