Theory still applies. They can try and kill every fish in the tank, but because it’s overstocked it’s just not possible. And being in an overstocked tank changes behavior too. It’s not the best for the fish but if you cannot give a dedicated 75 gallon to each fish then this is the way to minimize damage.
It's been a while but regardless of that don't Oscar's and African cichlids have different water parameter requirements? Also, unless this person has 2 more very large tanks the Oscar's and probably the flower horn will eventually be far too big to stay with the rest.
I don’t have any particular large fish, but from what I’ve gathered, a single Flowerhorn needs at LEAST 75 gallons. Oscars I’ve seen 55-75 for a single; 90-100 for a pair. I believe the owner of this tank said it was 600L, so just shy of 160 gal, but still… Flowerhorns are incredibly aggressive, and Oscars are assholes as well.
Yeah, I've cared for Oscar's and African cichlids before (a pretty decent pet store and a friend's 125 gal african cichlids tank) but never a flower horn. I totally get overstocking the tank and yes maybe there's a chance this person got the least aggressive Oscar's of all time but even being generous and ignoring the temperament, the cichlids in the Pic do not thrive in the same type of water. PH and water hardness are at near opposite ends. Also, it would be irresponsible not to at least have a plan to separate 3 fish that get big enough to eat the African cichlids whole.
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u/RedditSur4 1d ago
Theory behind overstocking cichlids is that the aggressive ones spread the aggression across all the fish and there’s less singling out.