Aquarium Salt
Definition: Aquarium salt is a pure form of sodium chloride (NaCl) used to improve fish health in freshwater aquariums. Unlike table salt, it contains no additives, anti-caking agents, or iodine, making it safe for use in aquatic environments. It helps reduce stress, support recovery, and maintain fish vitality by improving gill function and osmoregulation.
Common Causes/Uses:
- Reduces stress in fish, especially after water changes or transport
- Promotes natural slime coat production, which helps protect fish from disease
- Aids in recovery from mild bacterial infections and external parasites
- Used as a tonic in quarantine or hospital tanks
- Especially beneficial for livebearers (e.g., guppies, mollies, swordtails)
- Improves gill function, helping fish breathe more efficiently
- Supports electrolyte balance in freshwater species
Solution/Prevention:
- Use only true aquarium salt, never table salt, which can contain iodine and harmful additives
- Do not use marine salt (used for reef tanks) in freshwater systems
- A standard dose is 1 tablespoon per 5 gallons of water — always research species-specific tolerances
- Dissolve salt in water before adding it to the tank
- Be cautious with scaleless species like Corydoras, plecos, and loaches, which may be sensitive to salt
- Aquarium salt does not evaporate — remove it with water changes
- Avoid use in planted tanks unless treating in a separate container
Recommended Product:
API Aquarium Salt – Promotes Fish Health and Recovery
A trusted, additive-free salt made from evaporated sea water. Supports healing and reduces stress without harmful additives.
👉 Safe for most freshwater fish, ideal for use in quarantine tanks and routine care.
💡 Pro Tip:
When using aquarium salt, always pre-dissolve it in a separate container of tank water before adding it to your aquarium. This prevents undissolved granules from irritating fish gills or settling in substrate where it can harm bottom-dwellers or plants. Think of it like seasoning soup — you want it evenly mixed, not clumped up at the bottom.
