Tank chaos

[tommy_yellowbellie]

Well my tanks having problems.
I just got home to find my flying fox had died (it had been lookin under-the-weather for 3 days).
One of my harlequins has gone pale and looks like it may be suffering from fin-rot (i have been trating the tank for a few days)
Also my beloved cory has been resting in really weird positions. He will like flip over onto his front and just lay like that, or on his side, and only moves when startled by other fish. Im puzzled and worried. The tank water is as good as it has ever been..........
any help would be appreciated

 

[Sasha]

What are the ammonia, nirite, nirate and pH levels?

 

[jrd77]

So, your pH, Ammonia, Nitrites and Nitrites are all good? It might be helpful to know the levels anyway...Have you added anything new to the tank recently or done anything differently?

Hmmmm...If it were me I'd treat the whole tank with Melafix, take out the carbon filter, raise the temp and put a little salt in the tank (assuming salt will not hurt your particular fish).

 

[Wyld-Fyre]

Its a process of elimination. If it ain't your water quality, then it could be the type of 'medication' you're using. or could be some type of disease. Start with what's been asked.