Acrylic is a fairly new material for making aquariums, compared to glass. It is light weight and is much harder to break than glass, although it is easier to scratch than glass but unlike with glass, the scratches can be easily removed by buffering the acrylic.
Acrylic is easily molded and formed into almost any shape. Acrylic also has less of a tendency to distort things that are behind a curve. Acrylic has nearly the same index of refraction as water. Because of this, the only distortion you are likely to see is that the fish is slightly misplaced, but the size and color are true.
If you are setting up a very large tank - 500 gallons or more - or you are interested in a tank that is not rectangular in shape, you will probably want to consider acrylic.
Our most popular brand in acrylic aquariums is biOrb. If you like modern, unique design and looking for an easy to set up and maintain freshwater aquariums, you will love their aquariums. biOrb also makes lots of decorations for their aquariums which allow you to create your uniquely design underwater world.