200 gallon tank

What would you be upgrading to? I still wouldn't get one until you know you can upgrade and are close or already have some it, because sometimes things happen and some people either can't do it or can't get a big enough tank and then they are stuck with a huge fish that's too big and still growing. Other than that it seems like a good stock. Seems a little under stocked but with the bio load of the oscars keeping a light stock isn't a bad idea. If you wanted to I would say you could add a lot more bichirs if you wanted to.

I'd hold off on the rtc until you're able to upgrade. Mine outgrew my 150g in 9 months. Grew from 1" to 16" the first 6 months


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I'd do more larger bichirs for the bottom, maybe a hoplias wolf too the top will be too occupied by the aro and Oscars for anything else to fit comfortably, unless they are all really small haha and that won't last long.

Like others have said hold off on the rtc, they grow like lightning given the proper params and diet. Maybe a smaller cat like vulture cat or giraffe cat? They are quite pretty and don't get too big, they also aren't known for eating everything in sight like rtcs haha

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Unless you have a future 450 gallon or higher I would stay away from the silvers and the rtc needs a large pond (A multi-thousand gallon pond). They grow quick and its just trouble in the long run unless you have some deep deep pockets. The rest seem perfectly fine.