purifying water using shredded horseradish-how?

Brian Ford bjford at cix.compulink.co.uk
Sun Jan 15 13:51:40 EST 1995

But you do drink it! 

Water from sand-filter beds has been purified through the growth of 
ciliates which sweep up pathogens. My guess is that the horse-radish 
)like the straw) provides the substrate and food trigger which does this 
in contaminated bodies of water. The clear water of a mountain stream is 
kept that way by ciliates, too.

Brian J Ford.

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