Last Updated: May 21, 2026
API AQUARIUM SALT Freshwater Aquarium Salt 36-Ounce Box
Should You Use Aquarium Salt for Betta Fish?
Aquarium salt is a topic of ongoing debate in the betta fish community. Aquarium salt (sodium chloride without additives) has legitimate uses in treating certain betta illnesses — it can help heal wounds, combat external parasites, and reduce osmotic stress in sick fish. However, bettas are freshwater fish from soft, low-mineral waters, and they do not require salt as a permanent tank additive. Used correctly and at the right dose, aquarium salt is a helpful tool in your fishkeeping medicine cabinet; used incorrectly, it stresses bettas and harms plants and snails.
The key is using aquarium salt therapeutically and temporarily — not as a routine water additive. A typical treatment dose for bettas is 1 tablespoon per 5 gallons for general stress or disease treatment, used for no more than 2–4 weeks before gradually reducing via water changes. Never use table salt, road salt, or reef salt — only pure aquarium salt formulated for freshwater use.
API Aquarium Salt
API Aquarium Salt is the most widely available and trusted brand for freshwater therapeutic use. Made from evaporated sea water, it contains no additives, dyes, or iodine that could harm fish. It dissolves quickly and clearly in aquarium water. The dosing instructions on the package are straightforward, and the resealable box stays dry and fresh for years. This is the standard therapeutic salt product recommended by most veterinarians and experienced betta keepers.
Aquarium Therapeutics Freshwater Salt
Aquarium Therapeutics Freshwater Salt is another clean, additive-free sodium chloride option formulated for freshwater fish treatment. It is available in multiple sizes, making it economical for larger tanks or frequent treatment regimens. The fine granule format dissolves rapidly without clouding. A good alternative if API is not available in your area.
Fritz Aquatics Freshwater Salt
Fritz Freshwater Salt is a pharmaceutical-grade sodium chloride product widely used by fish stores and breeders. It is extremely pure, dissolves completely, and comes in a moisture-resistant resealable bag. Fritz is a trusted brand in the professional fishkeeping world, and their salt is an excellent choice for betta treatments, fish-room use, or anyone who goes through salt regularly.
What to Know Before Using Aquarium Salt for Bettas
- Use therapeutically only: Bettas do not need permanent salt; use it for illness treatment, then taper off.
- No iodine or additives: Only use salt specifically labeled for aquarium/freshwater use.
- Harms plants and snails: Live plants and invertebrates are sensitive to salt; remove them or treat in a separate hospital tank.
- Standard dose: 1 tablespoon per 5 gallons for general treatment; increase only under veterinary guidance.
- Salt does not evaporate: When topping off evaporated water, do not add more salt — the salt stays while only water evaporates.
- Consult a vet for serious illness: Salt is a supportive treatment, not a cure for bacterial or parasitic infections.
Final Thoughts
Aquarium salt is a valuable tool when used correctly for betta fish treatment. API Aquarium Salt is the go-to product for most hobbyists due to its wide availability and reliable purity, while Fritz and Aquarium Therapeutics are excellent professional-grade alternatives. Keep a box in your fishkeeping kit, use it thoughtfully during illness, and your betta will benefit from this time-tested therapy without the risks of overuse.
