Whats a minimum aquarium size or a tiger Oscar ?

Question

Whats a minimum aquarium size or a tiger Oscar ?

Answer 1

75 gallons.

Answer 2

While you can generally purchase these fish while they are still very small, they will grow quickly and need a large tank. An Oscar fish can grow to be 18" or even larger and when they reach that size they would need at least a 55 Gal. tank. I recommend a 75 Gal. tank for a pair of full-grown Oscars.

Answer 3

I would say a 75 Gallon is the bare minimum for an Oscar alone, 90 gallon is better. If you want tankmates, no smaller than 120-150 gallons.