This is a very long thread with over a hundred posts, so it is easier to ask for data than dig through to find it. What are the readings now for ammonia, nitrite and nitrate? If you are seeing ammonia or nitrite above zero, the fish are in danger. Water changes of half the tank every day until both read zero is all you can do. The Stability (bacterial supplement) will help build up the nitrifying bacteria, but any ammonia or nitrite over zero is harming fish, slowly but surely, and eventually they can succumb. If ammonia/nitrite is the issue.I lost the bumblebee platy it was floating this morning. I'm trying hard to get the water better so why are the platys dying as the water is getting better?
Byron.