- Jul 22, 2014
- Reaction score
The first occurrence was about a month ago when I mistakenly thought the fish was hiding in my shop vacuum hose and came out when I went to suck the muck out of my waterfall basin. I put the fish back into the main pond and it is doing just fine.
The second occurrence happened three weeks ago when I spotted a different koi swimming upstream in the middle of the stream. As soon as I tried to catch it, it swam all the way up into the basin and hid behind one of the vertical rocks underneath the waterfall. I netted that fish and put it back into the main pond. It survived for about a week and then I found it dead in my pump filter mesh. I know it had not been coming up for koi pellets prior to it's death and I recall seeing it take a large cedar branch into it's mouth which likely was stuck in it's digestive system.
The most recent occurrence was about a week ago when I turned the waterfall pump off to clean out the filters in the waterfall collector. I had removed all of the filters and the top ledgerock and was shocked to see a third koi swimming around in the waterfall basin. At that point there was no water left in the stream so it must have been up there before I turned the pump off. It too, tried to hide behind the vertical rock underneath the waterfall but I netted it and put it back in the main pond. This one and the first one both come for food regularly and appear to be doing fine.We had a ton of rain just prior to this last incident and the pond water level was at it's highest point so I am guessing that there wasn't much of a jump required to get into the stream from the main pond.
All three of the koi are from a springtime purchase so they are only about three inches long. I have several larger koi (12 inches plus) and none of them have shown any tendencies to "go upstream".(and I think it would be difficult given the shallow depth of the stream.)
Has anyone else seen this happen with their koi?