In the world of aquarium we find several types of aquarium. In relation to the water temperature going to have cold-water tanks and hot water tanks for tropical fish.
Another difference we will find the content of dissolved salts in water and thus can distinguish between freshwater aquariums and marine saltwater aquariums.
As a reference we can consider a tank of cold water whose temperature ranges between 10 and 18 degrees centigrade and the hot one that goes from 18 to 30 degrees centigrade.
The aquarium is the most widespread freshwater and to maintain a marine aquarium requires some experience and invest more money in technical devices (and the aquarium itself usually larger) and we must maintain a stable level of salts and a low temperature of the water as they often have used to cold-water species. So let's rule out a marine aquarium for a beginner.
Referring to the aquarium, we can find the typical fish ball, but not to those classified as if they were in aquariums origins of acuariofilia widely used as a means to keep tents cold water (red fish of all life). Today is not normal to see them in homes but are still on sale. The disadvantage of these tanks is its small size, they just fish can be moved and we must make continuous changes of water to maintain the values of nitrite and ammonia at low levels. For the aquarium itself would normally find in the shape of a parallelogram aquariums (rectangular section), but we can instruct us to measure or make various shapes and forms corner, hexagonal, etc ...
In relation to the species that will live in the aquarium, we can differentiate between ACUARIUM COMMUNITY or ACUARIUM SPECIES.
The aquarium community is the most widespread, there are fish and plants of different species. These species to coexist successfully sharing requirements for temperature, water chemistry and environment similar. Territorial species can exist only if the aquarium is large enough to create distinct areas in which other species took cover when they are attacked or intimidated.
The aquarium species is to maintain a specific species of fish. For example we can cite the cichlid species barbel or be ideal for aquarium species. Some cichlids such caches need to hide the egg.
Finally we can have breeding tanks and aquariums for breeding.