Why do my fish keep dying?

[rolltide]

This morning I lost my fire angle. Over the weekend I lost my royal gramma and my pearly jawfish. All I have left is my true percula and right now he seems happy. Nitrite are <.3 and nitrates are 0. Any ideas as to what is going on here. All my inverts are fine.

 

[rolltide]

The tank has been set up since September. My test kit says the nitrites should be a <0.3 which it is. This is the 2nd time I lost a set of fish. The first time was about 2 months ago and they all 3 died with in 2 days of each other.

 

[kris]

Do you know what killed your fish last time--like high ammonia perhaps?? What did you do with your tank after the first complete loss?? Test kits sometimes give readings as SAFE DANGER and IDEAL --always go by ideal--anthem is right nitrites have no buisness being in an established tank at all-0.0 The .3 nitrites may or may not have killed the fish but it is a good indicator that something else is wrong.
Like anthem said--give us some more readings / info to work with.