I just built a small pond 4ft x 5 ft x 3 ft deep and I have 2 koi about 7
inchs long and 4 other small pond fish that are 1.5 inches long.

They have been in the pond for 2 weeks now, before the pond they were in a
10gal fish tank for 8 months while I was waiting to build the pond.

during the day the fish stay at the bottom and dont do a whole lot of
swimming, but I just installed light on the pond and now I see the fish are
very active and eating.

Is this normal for the fish to be more active at night then during the
daytime?

Joel