I have stopped giving the medicated food. I also have replaced my dechlorinator, because I had had the old one for 4 years and it had this gross fishy smell. Could it have gone bad and poisoned the fish? The tetras seem okay.

The temp is around 78. The danio and rummy nose were the survivors of my original fish I cycled the tank with. The white clouds I've had for 2 months? maybe.

I did spray febreeze in the living room the other day, but the cover was on the tank and I didnt spray near the tank, and the fish were dying before that...

My remaining danio is still alive, but has begun swimming round and round in circles. He doesnt go one direction all the time, he just swims in tight circles over same area like he's looking for something. He looks thin and weak. The tetras soldier on...

So thats everything I can think of.