If there is no material that will corrode/react with the salt in the manufacture of the tank or its periferals then all you need to do is obtain the correct substrate, salt, heater thermostat, power filter, protein skimmer, ozonizer, living rock and learn about how to use all that stuff correctly then you can get whatever marine life you wish to keep.
You simply replace saltwater with fresh water in small intervals. Which lowers the 'Specific Gravity/Salinity of the water.
To adjust your specific gravity either add water or salt depending on the level of your Hydrometer. This should really be done in a container prior to adding it to the fish tank.
Add more salt into the tank?
You can raise a sea urchin in a salt-water aquarium. There are no fresh water sea urchins so you would need a salt-water aquarium to properly care for the urchin.
No. Specific heat is the amount of heat required to raise 1 kg of material by 1 K at constant pressure, while specific gravity is the ratio of the material's density to a reference density (typically water).
Specific Gravity.
Specific gravity is the ratio of density of material to the density of water, so when we use Kerosin instead of water then the value will be multiplied by the specific gravity of kerosin to get the actual specific gravity.
specific gravity = relative density ( relative to water) , so if the mineral is 10 times the density of water, then its specific gravity is 10
The specific gravity of water is unity. Anything with a specific gravity which is over unity will therefore sink in water.
S.G. of water = 1.0 Floating, S.G. < 1.0, Submerging, S.G. > 1.0.
"Specific gravity" or "specific density"
The specific gravity of salt water is about 1.025 or so.
Oil has the highest specific gravity. Water has the second.
The specific gravity of water is unity. Anything with a specific gravity which is over unity will therefore sink in water.
The specific gravity of water is unity. Anything with a specific gravity which is over unity will therefore sink in water.