Salespeople are well known for selling people stuff they really shouldnt have, especially in the fish department. They dont care as long as they have made the sale.
6-8 inches is very bad when its in a 5.5gal tank. An oscar in a 10gal is also definately bad.
Doesnt matter what type of fish it is, wether its a goldfish, tetra or other, research is best, dont believe all stuff you are told especially by fish salespeople *L*
Common goldies are treated badly by most people, it annoys me when people think they are expendable. They are a very fast growing fish, growing to huge proportions in a year or less (under optimal conditions) & they can live for 20yrs. They are the most abused fish out there in my opinion. Crammed into small bowls or tank, under the false belief that they only grow to fit their housing. Sadly they dont grow, this is true, but in doing so it vastly shortens their lifespan, by stunting thier growth. It is a cruel practise.
Sorry soapbox there
Soda ~ great to see that you are looking at upgrading your parrots tank size, well done...would love to see pics
