Questionok it started out of a sudden my fish just started breathing rapidly den one of my fish died and 2 others are about to die their layng on their sides tryng to recover themselfs what can i do ? i got 4 small fish that are fine then 2 sharks and a nemo which is fine 3 of my fish are acting up really bad should i QT them asap and see whats going on?
Answer
Yes,
it sounds like your fish are suffering from ammonia poisoning.
rapid breathing is caused by the following:
1. fish not getting enough o2
2. high waste levels in your water such as ammonia and nitrite.
3. gill damage from parasites.
4. I would QT them asap
I would perform a 20% water change with new salt water. Try a product that will neutralize the toxicity of ammonia like Amquel.
good luck todd