Stéphane Bourget hbiotech at
Wed Nov 29 09:28:44 EST 1995

You can consider Cryptosporidium to be 4 microns. A ceramic 
candle of 1 micron should stop Crypto if the pore size stated 
is exact (which is not always the case).

Stephane Bourget.
Hydro Biotech inc. 

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