Oscar and a Jack Demsey Tank Size...

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T

thepresence

Feeder Fish
MFK Member
Jan 2, 2009
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Canada
I want to have an Oscar and a Jack Demsey in one tank. I'm currently looking for a tank and was just wondering what anyone might recommend for tank sizes. I'm thinking 150 gallon would be big enough. I'd also like to know if i got a 70 gallon, how long would the oscar and the JD be comfortable in there until i needed to buy a bigger tank. Let's say i got them both as very young small fish.

Thanks in advance for your reply.
 
150gal would be good for life. A 75gal would work for a year or so.
 
I currently have two 75 gal tanks, and each one has an adult Oscar and an adult JD in it. Both tanks get along fine.

I should add I would only recommend doing something like this if you have other tanks to move them to if things don't work out. I cannot comment on water quality with this mix as both tanks I am referring two are part of a much larger water system.

Until recently, in my 125 gal I had an Adult Oscar, adult JD and a few other subdominant compatible tankmates and this tank got along fine. This tank was not part of a larger system and typical weekly water changes kept water quality in near perfect condition. Here is a pic of the 125 gal.

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Here is a pic of the 8" male/6" female JD pair getting along fine with the 12" Oscar

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Note: I do not, would not and could not put a breeding pair of Dempseys in a 75 gal with an Oscar. The aggression this pair showed while spawning is why I changed the stock of this tank.
 
My Oscar and JD get on fine but they are in a 180g
 
I had a JD, Oscar, Jag, and a couple of Cats in a 75g for about a year. The 150g should be fine.
 
I currently have two adult oscars and an adult JD in my 75 and I never have any problems. The only time there could be a problem is if the oscars were spawning because they would probably try to kill the JD but other than that a 75 is fine. But the bigger the better. If you can get a 150, then do it.
 
I would say a 75 would be big enough....I would recommend putting some dither fish in there too, like some giant danios. Although, it's usually best to get the biggest tank you can afford (within reason).....so you can afford the 150, go for it!
 
chances are you COULD keep an oscar and a jd in a 75g for life, with good filtration and water changes every few days. however it could potentially become cramped one day if the oscar reaches a full 12" or larger, and the JD hits his 10" mark.

if you cna afford and have space for the larger tank, by all means get it. this means you have happier fish to begin with, plus gives you a bit more room to add an extra fish or bottom feeder or something that may spark your intrest along the way. bigger is always better :D
 
for the price differences (atleast around me) I would get a 125 that would be plenty of space and not hurt the wallet quite so bad.
 
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