Freshwater
is defined as having a low salt concentration — usually less
than 1%. Plants and animals in freshwater regions are adjusted to the
low salt content and would not be able to survive in areas of high salt
concentration (i.e., ocean). There are different types of freshwater
regions. Freshwater is found in ponds, lakes, rivers, streams, and
wetlands.
Marine environments contain saltwater. Saltwater Marine environments
include the ocean, coral reefs and estuaries. Saltwater requires a
higher concentration of salt to maintain a suitable salinity for fish.
It is important to note that Reef tanks require higher amount of salt
and certain fish, corals and critters may not be suitable for the
higher levels of salt and vice versa. While regular salt Sodium
Chloride (NaCL) with no additives can be beneficial when added to
freshwater fishtanks in small amounts it will not work in Saltwater or
Reef aquariums. A seasalt mix such as Coralife, Kent, Instant Ocean, or
Red Sea will need to be purchased
Below
are buckets of Marine Salt that is suitable for Saltwater aquariums