My favourite microfilter is (was) the MSR WaterWorks II filter which contains a 0.5 micron ceramic depth filter, and integrated granular activated carbon element for removing treatment and secondary 0.2 micron filter. Sadly it appears that MSR has discontinued the WaterWorks II.
However, the ‘son of WaterWorks’ is the MSR MiniWorks Ex Microfilter filter which I also use. It’s basically the same as an MSR Waterworks II filter with its 0.5 micron ceramic depth filter and GAC element but without the secondary 0.2 micron filter.
The MiniWorks is lightweight, easily maintained in the field and pumps about a litre a minute if the water you are treating is reasonably clear. The clean water outlet has a large fitting that screws onto a standard Nalgene bottle allowing for easy two handed pumping.
The ceramic depth filter is easily cleaned with a scrub pad that comes with it and the filter’s thickness can be checked with a gauge and the filter element replaced when it has been abraded beyond its recommended thickness.
The filter element can be boiled to disinfect it and then air-dried if you are going to store it for long periods such as over winter. The filter elements are quite fragile when removed from the housing so you need to be very careful when cleaning them.
I’ve used this sort of filter for over a decade and only replaced the ceramic element once because I broke it while cleaning. The filter itself is great value and because it is amongst the most widely used in the world, the replacement elements are easily available.
I highly recommend the MSR MiniWorks Ex Microfilter, which when combined with a chemical treatment such as Polar Pure, creates a water treatment system that can stand up to worst case water situations anywhere in the world.
You can purchase the MSR MiniWorks Ex Microfilter from my shop.