Aquarium salt is perfectly safe for fish with scales. It's the scaleless fish you need to watch out for. Just make sure to mix it well when you add it, because if a fish touches the salt it's possible to get burned.

One application per water change is fine. It doesn't evaporate and doesn't get filtered out, so it'll stay. You can use the regular dosage or halve it; it doesn't matter. Bettas are very hardy, and can even tolerate brackish water conditions, which is why you someimtes would find a group of females living with some platies and mollies.

As always,thank you Minku

You're welcome. :)

Plain table salt is also fine. I have used both iodized and non-iodized. It is perfectly safe and always on hand.

I've used the aquarium salt in my 10 gallons tank in the past and it had 8 sepre tetras, 5 black skirt tetras, several zebra danios, white clouds, and cherry barbs. Yes, I had one beta and one striped raphael catfish. They all survived for 3 years. Salt is paradise for the fishies. Currently, I have 30 gallons tank with 10 Tiger Barbs, 6 Platies, 2 Dwarf Gouramis (one blue and one purpleish), and 2 striped raphael catfishes. Yes, there is salt and all the fishies are happily swimming around.

Salt is an old and in some instances, useful additive for the treatment of some parasitic conditions, but healthy fresh water fish in a properly maintained tank need only the levels of mineral salts found in their native waters; no more.

I'm against keeping salt in freshwater long-term for fear of creating even more salt resistant parasites and and bacteria. Fighting aquarium disease is already Hell, we don't need anymore super parasites!

Bettas usually tail-bite out of stress, so adding salt to his water will probably not help much. Just keep his water clean so it will heal. If you decide you do want to try aquarium salt, be careful. Salt can be harsh on scale-less fish like already mentioned, but also harms sensitive fish including some types of tetra and bettas. Some bettas have fatal reactions to salt, so only dose .5 to 1 teaspoon per gallon. Dissolve salt in water before adding it to the tank, and watch closely for the first 15 minutes. Be sure to have a bucket of dechlorinated, temperature matched water ready incase he does not like the salt.

ahh, im soo confused i have a 5 gallon aquarium, how much salt do i use? i have a betta, 5neon tetras and 3 ghost shrimP?? WILL IT HARM THE SHRIMP??

When I purchased bettas from overseas betta breeders, they advised me to add a little aquarium (NOT TABLE!) salt to their water. I add like 1/8 tsp. to my 1-1/2 gallon vase and let it sit several hours so it dissolves before adding my betta.

Can someone help me?
My red male betta Rio lives in a small glass tank that holds no more then less then a liter of water. I heard by googling it that you can add aquarium salt to their tank. I bottle tap water in two 0.5L bottles so that the next time I change his tank he has room temperature water. I recently started putting only 1/8 tsp. of aquarium salt in the bottles when i fill them. Is the to much or to less? and his reaction to the first tank change with the aquarium salt in it didn't seem to be soo good, he darted around a bit and then rested at the bottom of his tank, is the aquarium salt hurting him or killing him?

littlehippygirl, I was wondering about a comment you made about putting salt in with a beta which is what i am thinking about doing. You said to watch the beta and if he/she doesn't like it, take him out. How will I know if he likes it or not?

My beta isn't eating and isn't swimming much I'm very worried do you have any idea as to what it could be??

yes you can use aquarium salt about 1 tablespoon per gallon of water. Keep in mind that you cannot use salt when your fish is suffering from dropsy.
further more if you have any query regarding aquarium salt, please visit Benefits of aquarium salt. I found it very helpful.
- Betta Splendens