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Old May 15th, 2004, 11:12 AM
Lucky Rescue Lucky Rescue is offline
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Join Date: Jul 2003
Posts: 10,287
Yes, fish can get tumours, and there really isn't much you can do about it. If that is what yours has, it is probably preventing him from eating.

For future reference, you should replace about 25% of the water every 10 days or so for optimal conditions. Do you have a filter?
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