About Black Ghost Knife Fish

[michelle203]

Hello! I live in Hong Kong, so my English is not good. Please forgive it.
On Sunday, I had bought 4 Black Ghost Knife Fish back home. I was very happy for it. However, on Monday, I saw one of it was died. Then today, when I back home, I saw 3 of it was died also......I feel very unhappt at all. Can anyone tell me what happen? Why the Black Ghost Knife Fish died quickly? I want to buy it again but I don't want them died again. Please tell me how to feed it? and why they will die.
Thank you very much for asking my problem.

 

[CFC]

How big is the tank and how long has it been set up?

 

[michelle203]

um.....its tank is not too big, but have other fish.....
I set it up about 2 weeks ago....

 

[CFC]

Black ghost knife fish require a large and long established tank, that is one that has been set up and running with fish in it for at least 6 months without any problems.

If your tank is small and has only been set up 2 weeks but already contains fish then my guess is that it has not been cycled. This means that there are most likely high levels of ammonia and nitrite in the water in your tank which will kill the fish. BGK are very sensative to ammonia and nitrite and will be killed very quickly by this.