If Yahoo puts their "click" filters to purify water, they'll produce the best purified water ever. LOL
You better put a patent on the idea of using "software" designed for click filtering to purify water, so when they start making millions off it you can cash in.
You could have software, built into a microchip, that uses a programmed algorithm to examine water and apply x amount of chemicals at a specified ratio, etc. to "perfectly purify" the water. Better go register that patent quick buddy.