fluttermoth said:It is extremely unusual for fish to die like this. It would indicate to me that something else was going on.
Amy, have you been testing the water, for both ammonia and nitrite, every day? What were the actual numbers from your more recent tests? How big and how large have your water changes been? What's the highest level the ammonia and nitrite have reached?
fluttermoth said:1ppm of nitrite would be lethal
Fish often wedge themselves in odd places as they're trying to 'escape' the poor water/toxins.