Lost a Goldfish

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ccross

Aquarium Advice FINatic
Joined
Aug 14, 2011
Messages
792
Location
NY
Just came home to find my Black Moor dead and floating. The other 2 goldies are alive and well so I'm unsure what happened. I have been in the process of cycling the tank and have been doing 25% water changes every day. The Ammonia level has been between 0 and .25 and has never been over that. My thinks that I killed him by changing the water and doing what is needed to cycle the tank. She is convinced that I am just stresing the fish because she has ALWAYS had multiple goldfish in a smaller tank and never had to do water changes, blah blah blah.

I know I'm doing the right thing by keeping the water monitored and changed but she now thinks I am just doing more harm than good.
 
Forgot to post my question...

Since I am unsure what killed him, should I treat my tank in any way so the other fish dont get sick?
 
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