oscar tank size?

  • We are currently upgrading MFK. thanks! -neo

doomiedee

Fire Eel
MFK Member
Nov 13, 2011
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Waterbury
i know plenty of people recommend a 75 for a full grown oscar but today i was told a 75 is too SMALL! just want some clarification..
 
well some people keep oscars in 55g tanks, but i 75 should be enough, but like you said some people rather keep them in larger tanks
 
75g is fine some people on here just have different opinions when it comes to tank size.. Kinda a sensitive subject for some people.
 
75g is fine some people on here just have different opinions when it comes to tank size.. Kinda a sensitive subject for some people.

this is very true.. i mean if a 75 is good for a midevil witch max around the same size whats different about an oscar
 
2 fish could be the same size 1 is more active, a messier eater, and produces more waste. Which is gonna need a biger tank? Activity level plays a huge role in this


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Though i agree that a 75 gal is a good min tank size for a oscar, just because 2 fish are the same size dont mean they have same min tank sizes


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That's true but why recommend it if the fish max at or around the same total length?


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2 fish could be the same size 1 is more active, a messier eater, and produces more waste. Which is gonna need a biger tank? Activity level plays a huge role in this


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That all depends one the fish's personality. Both the midevils I kept in the past were exactly as you put it but my current Oscar is complete opposite. My convicts eat, produce more waste and are more active then my Oscar does. He just sits in his corner all day barely moves. He eats every few days so that cuts down on waste also.


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In nature a pair of adult jack dempseys will hold a territory the size of an SUV, somewhere between 500 and 1000 gallons, and the pair will chase any other cichlid away. In the pic below the rock is about the size of a VW Beetle, the depth from surface to bottom, is about 10-15ft, and an interloper is being chased out by the male, other non cichlids are usually ignored (those live bearers hovering near the surface), although the catfish in a lower left which preys on JD fry, is watched like a hawk.

Does this mean a pair of JDs should be given a 500 gal tank? Many consider a 55 adequate for a pair, because aquariums, by nature, are unnatural environments.
Is a 75 gal too small for Oscar? An adult grows larger than a JD?
Would you like to spend a lifetime in a bathroom, or a room the size of a jail cell?
Can the Oscar survive adequately in a 75? Of course, but is it cruel and unusual punishment?
What do you think an Oscar territory in S America would be, a 75 gal puddle, or a few thousand gallons or potentially millions, in a river?
Is it ethical to hold something large just because we like it, in what "it" might consider a puddle, or would it be better to choose something smaller that would be an ethically more realistic choice.
All questions we aquarists should probably be asking asking ourselves every day.
 
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