Help! My Tank Is Dieing

[Carl the Crimson Wonder]

Pimafix that's all I used. I was under the impression that it wouldn't kill my benifical bacteria either, but it's the only thing I can think of tha could have happened.

 

[WILDER]

I doubt it was the pimafix.
Size of tank in gallons or litres.
How many fish and which type.
How long has the tank been set up.

 

[guppy fan]

I wouldn't recomend using salt with corries. They are a scale-less fish and I've heard it burns thier skin. They have armored plates, called scutes, instead of scales.