Sorry about the duplicate post as I accidentally sent the original off..


We recently built a small 6'x6'x30" a few months ago and planted the
perimeter with various flora including some stuff from a friend's natural
pond (read, small lake).

Our pond has a nifty waterfeature of a large boulder with a core hole
drilled through it. It sits propped on the edge of the pond and water is
provided to it by a pump in a submerged homemade filter box.

After waiting for the water to stabilize (but it is still rather silty), we
then I bought 6 small 3" goldfish to begin stocking our pond a couple days
ago.

However, we have noticed an interesting event with those fish: they
congregate around the base of the rock and seem to enjoy the bubbling
falling water. In fact some of the fish are acting like salmon ..trying to
jump up the waterfall! Most of this activity seems to be happening as the
pond starts going into shade at the end of the day.

Anyone know why they would do this?

Thanks,
Jack