One of the many questions I regularly get asked when we are discussing aquarium projects with our clients is ‘what type of aquarium should I have – one with Tropical marine or freshwater fish?’ As this is such a popular question, we have produced a helpful article detailing all the pro’s and cons of each type below, as well as the aquarium ‘set up’. This is based on our experience of installing and maintaining hundreds of different tanks for our clients over the years.
The first topic to cover is what exactly is the difference between the two types of aquarium fish. Well, this is quite simple. Although both types contain fish from tropical (warm) climates, the freshwater fish are from the rivers in these climates and so live in fresh (unsalted) water. Tropical marine fish are from the sea in these areas, and therefore live in saltwater. There are a few fish which are called ‘brackish water’, and these are from the water areas where the rivers flow into the sea, and so are used to a much lower salinity than proper marine fish. However a fish tank containing brackish water fish is less common, and so we have not included them for the purposes of this article.