If you want to go out for a lunch or dinner, preparing a dinner bucket in order to pack the rest food you haven't eaten out, it's environment-protection N economical.
I use one teaspoon per gallon when I initially set up a tank, then about once a month make a partial water change, adding the same ratio of salt to the new water.
So accustomed are most of us to the association of success with money that the thought of giving up good salary for an idea seems like a little bit crazy.
Nor does it explain why, in a species where one parent determines handedness, a brood is not exclusively right- or left-handed when the offspring would have the same genetic predisposition.