What is aquarium salt?

Aquarium salt is mixed with water before being added to a saltwater tank to create the correct environment for marine animals. The appropriate specific gravity(a method used to measure the salt concentration) is about 1.023-01.025. You can buy a meter at your local petsmart etc. The most common name in salt mixes for aquariums is Instant Ocean.

You MUST mix salt correctly in order to run a saltwater tank. If you do not add salt to the water or do not add it in the correct amount, you will lose your tank's inhabitants.