My fish keeps dying!

[One fish]

why? i set up a biocube. the salinity is 1.024. My fish was in there for maybe 24 hours and then died. i checked the water. ammonia is 0. nitrite is 0. and nitrate is 40. what is going on? i got another fish. because i didn't find anything wrong with the water. It lasted 3 days. It is cycled i thought. It was cycled about 2 months now?

 

[fishhuman]

What kind of fish was it

 

[zeebies]

Need more info. How did you acclimate the fish? Do you have a quarantine procedure? Can you describe your tank set-up? What fish did you add, etc.

 

[tubbs2323]

Yes more info needed, a slow acclimation is a huge key to keeping fish alive

 

[Sk8r]

A slow acclimation [one that lasts over 30 minutes] can be lethal, [ammonia poisoning] and it takes as long as 3 days for the fish to die.

 

[Flippers4pups]

Sk8r is very right! Lfs salinity that the fish was in and current tank salinity must match before transferring. Thus a QT is a good idea. There is stickies here that cover acclamation and proper Qt procedures.

 

[MBK]

Also, how long did the LFS have it before you bought it? It may have been stressed from shipping and never recovered. I have seen dead/dying fish in LFS tanks and never buy unless I see them eat first.