A fish tank is a replacement of the natural habitat of fish so that they are displayed in a home or any other place for aesthetic purposes. There are several factors that must be put into consideration when purchasing a fish tank. These include the kind of fish that will be put in the tank. Some fish require the space that a large fish tank provides while other kinds of fish will be fine in a relatively smaller tank. The fish tanks being purchased will have to be large enough to accommodate a sufficient number of fish. 

Another factor to consider is the space that one has in their homes. For a person who intends to keep a pet fish for the first time, it is advisable to settle on a relatively small fish tank such as a 5 gallon tank. People with smaller space should also consider keeping a limited number of fish. They should not use a fish bowl since the maintenance involved is restrictive. The shape of the tank is also considered when obtaining the fish tank. The most common shapes of fish tanks are the rectangular and hexagonal. One can also find bubble tanks that are round in shape and coffee table tanks as well as slender fish tanks that can fit through walls. 

When settling for the shape of the tank to be purchased one should consider the location where it will be set so that it is ideally placed. Tanks that are rectangular in shape are most ideal for quality of water and the health of the fish since they occupy a wide surface area that facilitates proper air circulation within the tank. The tank allows for free exchange of gases within the tank thereby making the aquarium very healthy. A hexagonal tank on the other hand does not allow for good aeration and will require high level maintenance. In addition, the number of fish that can be hosted within this tank is limited. 

The location where the tank will be kept should also be considered when determining the tank to acquire with regard to the weight of the tank. The weight of the tank will tend to dictate the location selected for the tank since it should be able to support the weight and still retain stability.