NO sea salt!!!! That is a definite no no for bettas :) you can use aquarium salt... I have the "aquarium salt for fresh water fish". You dissolve the amount you need in aquarium water in a container. Salt may or may not work, depending. I use it for stuff like ich.
A teaspoon usually works per gallon. some people up it to 3 teaspoons. You should add one teaspoon worth, every twelve hours to get the fish used to it. you apparently, should not do this for more than 10-14 days.
If he is in a container, it is easier. then you add the salt, and each day do 100% water change. I used it for my 20 gallon, and did a 20% daily water change with gravel siphoning. Plus, you should also make sure his temperature stays at or above I would say 80 degrees F. I did my salt treatment at 86 F temperature.
If it is for ich, the salt kills free swimming ich.
There is also epsom salt, which is usually used for stress, bloating, torn fins, SBD...
Last edited by Sena Hansler; 09-22-2011 at 04:19 PM.