Am I overstocked?

The Oscars won't eat full grown silver dollars.

Presuming your fish are all juveniles you are not at all overstocked. You hear a lot of different opinions on stocking for Oscars (55 min for 1, 75 min for 1 - most people would say this - 100 min for 2, 125 min for 2, 125 plus some smaller fish min for 2).

Don't add any more fish. Keep an eye on especially your nitrate reading as they mature - you want less than 40 ppm at all times.

The far more important question - if you have just purchased the tank/fish - is whether & how you cycled it, and whether you have a good liquid drop test kit ?

edit - almost forgot ! welcome to AC :) I'm going to move this to cichlids for you for some more views.
 
The Oscars won't eat full grown silver dollars.

Presuming your fish are all juveniles you are not at all overstocked. You hear a lot of different opinions on stocking for Oscars (55 min for 1, 75 min for 1 - most people would say this - 100 min for 2, 125 min for 2, 125 plus some smaller fish min for 2).

Don't add any more fish. Keep an eye on especially your nitrate reading as they mature - you want less than 40 ppm at all times.

The far more important question - if you have just purchased the tank/fish - is whether & how you cycled it, and whether you have a good liquid drop test kit ?

edit - almost forgot ! welcome to AC :) I'm going to move this to cichlids for you for some more views.

The tank has been cycled :) the fishes were purchased right after the previous fishes died due to overnight power outage:( rip 2x 8 year old oscars and other fishes.

I wonder if I should have gotten oscars again this time around, as I could put smaller (thus more) fishes instead..


EDIT: the tank has been filled with the indicated fishes for about 3 weeks now.
 
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Gotta love the Oscars :)

ever work out what killed the other guys ?

how long was the tank without fish ?
 
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I agree it will be over stocked when all are full grown but as long as you do weekly water changes all should be ok and when and if the oscars decide to take out the dollars than i wouldnt replace anything..
 
The black oscar is showing aggression towards his albino oscar buddy :(. Seems like the black oscar is trying to nibble/bite the bottom of the albino. The albino is cowering in fear behind rocks and various hiding spaces... but when it's feeding time the albino races up to the normal spot to eat though.

All the fishes seem to prefer hanging out on the right side of the tank for some reason (the feeding zone). They don't really swim back and forth in the tank as I would like them to :(

EDIT Additional question: Someone told me that oscars and silver dollars shouldnt be together, since one is a carnivore and the other an herbivore. But so far in feeding the silver dollar seems to have an appetite for anything. And through research I thought they were compatible too. Am I wrong?
 
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Sounds like a dominance issue possibly.. LB for LB the dollars hold no chance up against an Oscar when all are full grown the only thing that could help is a very large tank so that the dollars could avoid being target practice for the Oscars..

But as most sound advice goes is that you can tell someone this and the reply you would get is a disturbed look of (what did you say) and most folk will continue on with what their doing..

In my time as a hobbyist i have seen several Oscar combo's and a percentage of those worked and didn't so it will be a hit or miss type of situation, its all up to you with feedings and maintenance issues..

So could it work -yes, could it go terribly wrong-yes, good luck my friend and enjoy..
 
what is LB? I thought silver dollars are compatible with oscars (after much research online)!? When I purchased the fishes and put them in the tank the very first day, the black oscar sneaked behind several dollars (my guess trying to get a bite), but failed. Ever since then there has been no signs of aggression towards the silver dollars by the oscars.

Actually the whole tank has been pretty decent.. until a few days ago when the black oscar decided to scare the albino oscar away.
 
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