What tank size would i need once all these fish are fully grown and living together?

i used liveaquaria.com to look up minimum tank size for only one of each it goes as follows Oscar -70gal. Arowana-250gal. Pleco-70gal.Black sharks & Bala sharks-70 gal Ghost knife- 50gal to 100 gal (depending on type of knife fish) Prochilodus-70 gal with the quanities you list and temperment of these fish,housing them would require at least a 500 gal tank
 
300 gallons, no less. It's not just the size of the fish that you have to consider, it's the temperament of each species.

Personally I wouldn't do it...
 
i used liveaquaria.com to look up minimum tank size for only one of each it goes as follows Oscar -70gal. Arowana-250gal. Pleco-70gal.Black sharks & Bala sharks-70 gal Ghost knife- 50gal to 100 gal (depending on type of knife fish) Prochilodus-70 gal with the quanities you list and temperment of these fish,housing them would require at least a 500 gal tank
 
300 gallons, no less. It's not just the size of the fish that you have to consider, it's the temperament of each species.

Personally I wouldn't do it...
 
300 gallons, no less. It's not just the size of the fish that you have to consider, it's the temperament of each species.

Personally I wouldn't do it...
 
300 gallons, no less. It's not just the size of the fish that you have to consider, it's the temperament of each species.

Personally I wouldn't do it...
 
300 gallons, no less. It's not just the size of the fish that you have to consider, it's the temperament of each species.

Personally I wouldn't do it...
 
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