Not sure exactly how old the tank is, I purchased it used myself with the intention of setting up a second tank Between the two of us, I would approx 3 years.
The tank was built by world class aquariums out in the city
i am going to have a 24*24*20 acrylic tank with external overflow and drilled for a closed loop available in about a week you can see pics at mmike1992 cube tank build log it has some scratches but nothing deep $175.00