Help! Sick Oscar!

burntblues

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May 23, 2004
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I've got a very large tank with a large oscar, a jack dempsey, an irridescent shark (I know, a bad idea, but I didn't know), and a wolf fish. I recently put some snails in to take care of the algae problem, and my jack dempsey attacked and killed both of them. Since that time the oscar seems to be really sick. I just came back from a night out with friends and he was laying at the top of the tank barely looking alive. I touched him with the net assuming he was dead and he freaked out, coming immediately back to life (I guess I pulled him away from the white light). He was laying on his side on the bottom of the tank last night, but when I checked the chemical balance of the tank the PH and the ammonia levels were right on. I treated the tank anyways.

The oscar seems to have faded substantially in color. He was dark black with bright flourescent orange stripes. Now, he is black but with almost barely orange almost white stripes. Also, much more of his body seems lighter in color now.

It seems odd that something has been affecting him, like a disease or something, because normally the irridescent shark is the first sign of any problem with the tank (Oscars are so hardy and the irridescents are so sensitive.)

I know that the wolf fish has been snapping at him trying to establish his territory (he's had a few missing scales, one looks pretty bad now that I look at it closer), and I'm going to start treating the water with melafix. Oddly, the Wolf Fish leaves all of the smaller fish alone, he only goes after the oscar that is literally three/four times his size.

Does anyone have any theories about what I can do to care for him? I'd hate to see something happen to him, he's a way cooler pet then the cat is, so any help is appreciated. I'm sorry this is so long.

Mike
 
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Caveat: I have very little experience with Oscars. I did have one in college about a decade and a half ago.

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You should probably check all of your water parameters just to be sure that all of them are what they should be. However, the fact that only your Oscar is sick leads me to believe that it is afflicted. The discoloration you mention is common for fish when they are stressed or ill. Again, I would suggest that you start by checking all your water parameters. You might also try a google search for Oscars and disease or ailments, etc.

Maybe by the time you finish, someone with more experience will have read and responded.

One last thing, how old is your Oscar?
 
Oscars are fairly prone to contracting fungus, usually around the gill area. Check to see if there is a white cottony substance or inflamed and pink on the gills.
 
Need more info dude. What's the status? I'll check back in the morning, otherwise I'll figure he's dead. I have a couple ideas but need more info. Where does he hang out during this time the most, top or bottom? Any signs of fungus? Was he laying on his side when you touched him with the net? If so sounds like a bladder infection. How is he swimming, straight or on his side?Let me know I can help.
 
What about the oscar? What other physical detail can you give us? Is it bloated? Does it's anal look like it's got fecaes stuck in it?
Will it eat?


Lila
 
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