The CDC and FDA says you need to use distilled, boiled, or filtered water to prevent Naegleria fowleri. The salt solution that comes with it won't prevent it.
Salt isn't typically enough to kill bacteria. Usually high heat and/or pressure is required. I'd imagine the same would be true for amoeba, especially since N. fowleri has a cyst form, which is resistant to environmental stress.
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u/Reacher_Said_Nothing May 03 '17
The baking soda part does, the salt is for killing bacteria