These here are the PVDF fine 0.2 micron pore size, and they are ideal for use as the final filtration device, but I would highly recommend investing in the 0.45um or 1.0um size too to filter prior to the 0.2um, starting with a sterile compressed cotton pre-filter, you shouldn't have any issues with clogging unless you're putting something through it that you shouldn't be, or depending on the