Used to replace two expensive backwash filters that were causing more problems than they solved. And it's a much cheaper solution. Only filters should be changed every 5-6 months. I use that as a pre-filter followed by a 1 micron filter and then we have an ultra filter with a sub micron backwash filter that catches everything else. The 1 micron filter is used to trap any "slimy"/iron bacteria that could clog the ultrafilter before it reaches the end of its life. Will definitely buy again.
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