Minimum tank size for an oscar?

a goldfish bowl...







jk, really You need a 70g, a 55g is pushing it just because of size, and bioload, cause they are slobs.
 
my sister has a 3 inch oscar in a 20gal but I know that it will outgrow that quickly...I have a spare 46 bowfront in the garage that I am gonna give her...I guess taht will buy her some time. Im more into my reef tank so i really dont know too much about fw. thanks for the input.
 
I have heard 60 gallons per oscar is adequate.
 
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