salt bathes for healthy kids

our 'experiment' isn't really over yet but so far we are healthy and happy! my husband is convinced that salt baths twice a day will help to keep away colds and flu for our kids. so our new morning regime is bathtub for a quick salt bath and then also at night before bed. I have talked before about how salt baths help with eczema, mostly for mild eczema. fill tub and put enough salt into bath that it tastes like the ocean...and whola! twice a day. now we need to try this on adults...please let me know your results if you try the experiment.