Many people start with a freshwater aquarium because it is easier to get it started and maintain it. As they become more experienced they begin to consider keeping a saltwater tank because it offers a new challenge and many new varieties of salt water fish species to care for. One of the obvious differences in saltwater aquariums to freshwater ones is that there is salt in the water. Due to the known process of osmosis water flows from areas of low salinity to high salinity areas. In the case of salt water fish species there is more salt in the water than in the fish.
Thus salt water fish species will lose water to their environment and constantly have to drink water to preserve the balance and stay healthy. Thus salt water fish species are very different from freshwater species. Freshwater fish need to rid the body of excess water and salt water fish species need to rid the body of excess amounts of salt in order to be in harmony with the environment. Saltwater fish actually need to work harder to maintain harmony within the environment. Thus the most important part of keeping salt water fish species is maintaining the specific gravity of the tank water. This is actually the level of salt in the water.
You need to understand the specific gravity that salt water fish species you are keeping are comfortable in. Then you need to keep the water at this gravity. Keeping a saltwater aquarium is more complex than a freshwater tank because there is more responsibility on the fish tank owner to ensure the water quality is correct for the fish living in it. In conclusion, the benefits of keeping a saltwater tank are more diverse environments and species to care for.
