A dying question?

[shimmy]

The deaths did not happen during the water change so having the flow off I still don’t see the chance of that being what was the cause. I tested for ammonia as soon as I had noticed it and found nothing on my tester and same with the chlorine testing. Im thinking from everything people have suggested is that I had too many fish in my tank for the age of it and to be aquascaping and playing around in my tank shook the ecosystem too much.