I am not positive when it comes to how long does it take a dead fish to start floating but i think it is around one to 3 days and even after that all the dead ones don't float. The reason I bring this up is from my experience when I doubled my aeration run times it sometimes killed a few fish like going from 12 hrs to 24 hrs it might kill a few fish. I also one time experienced where I found a few dead small bg almost every day. I had added a different size fish food and after I did I started seeing some dead bg floating. I was where you are at and could not figure it out until I realized maybe the fish were choking on the feed. These dead fish were in the 3 to 4" size or maybe even a little smaller. I stopped feeding that sized feed and the fish stopped dying. Is it possible the feed you were feeding was choking the smaller fish? It does happen. Any chance it has the combination of things that are killing the fish?

Do not judge me by the politicians in my City, State or Federal Government.


Tracy