I onced used 1/2 teaspoon and did not care for it.
Doing a salf water flush taste like crap but is no big deal.
But to have too much salf in our drinking water ruins the taste for us.
We limit it to 1/4 teaspoon per gallon.
Another probem we have is if we refill our glass gallon jug with distilled water and add one drop of oregino oil too many times without a hot water rincing, the oregino oil builds up in our glass jug between refills.
That ruins the taste too. So we hot water rince our jug every three fills.