I've finally found a great water change filter cartridge that will last a long time and give a good flow. We have a lot of clay where we live and other filters clog too easily. Pleated paper filters work best, but 20 micron filters work best for me. I've had a total of 4 weeks with 8 people in the house over the holidays and have been using the same filter for 2 months and it's still working. So far I am a satisfied customer.
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