
I think I missed the last cartridge change because the filter was so full and clogged it had its own ecosystem. I've used these wrapped "yarn" filters (saving some of them for yarn) but this is a hard, porous material. Water flows well, filters well. I'm not sure how long each will filter effectively (I'm in my 3rd month now and the water pressure is still good...), but with 6 filters for about $20, I and my sediment filter should be set to at least 3 of the year. Now when I think of turning the stopcock to actually pass the water through the filter so I don't clog the screens on the washing machine inlet hoses. . .

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