I was browsing around today,cause I had to grab some filters for my Canister.I noticed a 75 gallon bow front tank,measurements were 48x18x20.Now my 55 gallon is a 48x13x20 at the moment,would it be consider a major upgrade for my Oscar who is 9 inches at the moment or should I find the 75 gallon tank,that is measured 60x18x16?Would it make much of a difference,since I am getting only close to a foot in length?