05-10-2019, 05:44 PM
Carey: in the paper they found that RLW did not pass through a 5 micron carbon block filter. The ones that got through the 10 micron and smaller polypro filters were after letting them sit for a while before running water through again, suggesting that the worms are able to make their way through faults in the polypro filters when given enough time, but not the carbon ones. RLW are about 25 microns wide so they should not be able to get through at least a 10 micron filter, though the nominal ratings aren't precise; for example, the 20 micron filter says it removes 95% of particles over 20 microns and 99% over 30 microns.