Using Aquarium Salt Correctly

Some freshwater aquarium enthusiasts may walk by aquarium salt in an aquarium store and never consider its possible uses, other than for saltwater tanks. In fact, aquarium salt is also useful for freshwater tanks and ponds to keep fish healthy and free of bacterial infections. Here’s some information on the chemistry of aquarium salt and how to properly use it in each aquatic environment, brought to you by the staff at Aquatic Warehouse, a trusted aquarium supplier.

The Chemistry of Aquarium Salt

Marine salt is safe for fish because it doesn’t include additives such as iodine or chloride found in table salt. It’s collected by evaporating sea water down to pure sodium chloride, and it may contain beneficial natural minerals such as potassium and magnesium. Aquarium salt is different than marine salt and is often labeled as safe for freshwater fish.

Use in Saltwater Tanks

Saltwater fish cannot withstand harsh changes in water chemistry. However, if a saltwater tank is set up properly it can display some of the most stunning fish and coral available for aquariums. Marine salt is added slowly while using a hydrometer to reach a specific gravity between 1.023 and 1.025. Wait 24 hours for the chemistry to stabilize, then take another reading and adjust your levels as necessary. It’s important to set up a saltwater tank at least 24 hours before bringing starter fish like damsels home to achieve the correct water chemistry. Regularly monitor the water chemistry and specific gravity of your saltwater tank. Remember to add bacteria when you add fish.

Use in Freshwater Tanks

Low salt levels can keep freshwater fish healthy and help fish heal quicker from wounds or fin rot. It can also enhance gill function because salt increases electrolyte levels, which aid in oxygen uptake. The amount of salt needed is only 1 tablespoon per 5 gallons of water. Try not to use aquarium salt long-term in a freshwater aquarium. To remove salt from a freshwater tank, multiple daily 25-30 percent water changes are needed. Avoid using salt specifically designed for saltwater aquariums, or use a very limited amount, if your tank has freshwater aquatic plants, as they can be susceptible to salt.

Use in Ponds & for Sick Fish

Pure rock salt can be added to a pond for the general health of the fish, or it can be used in an isolation tank for a sick fish. Most ponds contain aquatic plants, so limit the salt to 1¼ cups of salt per 100 gallons of water. Sprinkle the salt around the edges of the pond. Don’t add more salt unless a significant amount of new water is added, and keep the ratio the same. With sick fish, remove the fish and place it in an aerated isolation tank filled with pond water that has the salt level increased to the equivalent of 5 cups of salt per 100 gallons of pond water. Let the fish rest in the tank for 10 minutes and then return it to the pond. The very best way to add rock salt is with the aid of a digital salinity meter, especially if treating for parasites.

Whether you need aquarium salt or anything else to maintain your fish tank, such as a dosing pump, LED lighting, or protein skimmer, you can find what you’re looking for at Aquatic Warehouse. Reach out to one of our aquatic experts today at 858-467-9297.