Ahh!

[jholmes06]

I need help urgently ! I have had my tank for about 2-3 months with not one problem, now all of a sudden, my fish one by one are dying. They have no signs of sickness before it happens, they just stop swimming, lay on the bottom of the tank and dont move until I scoop them out. I have done water changes, vaccumed the bottom. There is nothing wrong with the pH, water temperature etc. Could these be parasites ? Im not sure.. HELP!

 

[creeker]

What are your ammonia, nitrite, and nitrate readings?

 

[Xraymark]

Is the surface of the tank water being agitated with your exit filter pump. I.e maybe not enough oxygen getting into the water.

 

[jholmes06]

I have an air stone in the tank so the water is oxygenated. But im testing for ammonia etc right now.
I was wondering could the air stone be a possible cause of this ? It was the most recent addition to my tank and there was nothing wrong with it previously. I did rinse it before i put it in but could this still impact the fish ?