when fresh and salt water mix.. no use for drinking...

SVADHATOYA PRAVAHATIM NADHYA SAMUNDRMASADHYA BHAVATYAPEYA, GUNA GUNGYESHU GUNAH BHAVANTI , TE NIRGUNAH PRAPYA BHAVANTI DOSHA MEANS ---Rivers always flow with soft sweet water but when these mingle with the sea the water of these rivers become salty and of no use for drinking.Those who understand qualities , they only respect qualities for all others--these qualities become defects.---SUBHASIT