...All four feeder goldfish stay huddled together where the water gets sucked into the filter. They are pets, so there is nothing waiting to eat them. Is it just soothing to them to have the water rushing past their bodies? Or is it something I should be concerned about?
Answers (1)
There is something in the water that shouldn't be there. I once patched a crack in the glass by gluing a piece of plastic on the outside. The fish started swimming through the bubbles from the aerator, and after a few weeks they died. It sounds like you have something similar.