Aquariums have evolved into a very popular hobby, with about millions of aquarium and tropical fish enthusiasts worldwide.
Starting in the 1850s (when the predecessor of the modern aquarium were first being developed as a novel curiosity) the ranks of aquarium keeping has grown as more sophisticated systems including lighting and filtration systems were developed to keep aquarium fish healthy.
However before you can get started in the hobby you must first buy an aquarium. When you get to the pet store or specialized aquarium store you will have lots of aquarium tanks to choose from:
Metal Framework:
Most of the old style aquariums are made with sheets of glass, which are held in a metal framework. This is usually constructed of pieces of angle iron or stainless steel, which are welded together at the corners. Leakage between the glass and metal is prevented by putty aquarium cement, acrylic or silicon sealant.

Fish Globes or Bowls:This type of aquarium is useful for emergency purpose, but is not to be recommended as a permanent features. The glasses are cast in one piece and a crack, however small, may suddenly expand and cause a flood. This not only results in a loss of fishes but also necessitates the buying of a new tank, as it is impossible to repair the old one.
Also, when looking through the walls of this type of aquarium, there is distortion, which adversely affects one’s view of the fishes. Similar disadvantages apply in fish globes or bowls.
Plastics:
With the ever-expanding applications of plastics, it is not surprising that these synthetic that these synthetic products have been used to replace glass for aquarium. Plastics have advantage of being unbreakable, but are soft enough for the surface to become scratched. This is in time will mar transparency.
Vitorlite:
This glass-like material is available in many different colours and some very pleasing effects can be obtained by applying it to the sides to back up the aquarium. Moreover, being opaque Vitorlite will hide the wall and any unsightly wires or other apparatus behind the aquarium.
Wood:
Aquarium frameworks with wood are desirable mainly for aesthetic reasons. The wooden framework however will have to be constructed from plywood to prevent warping.
The advantage of the wood lies in the fact that it can be polished, covered with upholstered rug, stained or coated with colours to harmonize with the furnishing of the room.