i think you would need more than the syringe and arm power backflush to really restore a good flow over years, but hey it's only 30 bucks and mine has been working for 4 years
True, and they also claim that the filter is good for at least 100,000 gallons. That may be correct and I'm just doing something wrong, but my experience with it is more in line with what most reviewers claim: about 1,000 gallons before I can no longer restore reasonable flow.
As you say, they're inexpensive, so I don't sweat this too much.
i think you would need more than the syringe and arm power backflush to really restore a good flow over years, but hey it's only 30 bucks and mine has been working for 4 years