The various types of aquarium

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.

Battery Jars: Fish Globes or Bowls: This type of aquarium is useful for emergency purpose, but is not to be recommended as a permanent feature. 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 fish but also necessitates the buying of a new tank, as it is impossible to repair the old one.

Moreover, 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 application of plastics, it is not surprising that these synthetic products have been used to replace glass for aquarium. Plastics have the advantage of being unbreakable, but are soft enough for the surface to become scratched. This 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 furnishings of the room.