[header] How to care for an oscar [title] Get a large enough tank. [step] Before owning any fish, you need to have a home for it. Oscars grow to an average of 14 inches so they can't fit in just any tank. 
While an oscar can live in a 30-gallon tank, it is suggested that they live in a minimum of a 50-gallon tank. [title] Keep the water warm and maintain a neutral ph.