Bought to replace the crappy filters that AlkaViva sells which never lasted half their life before becoming clogged or leaking. They look just like the old filters did when the Royal water purification system first came out in the US 20 years ago. At the moment it is halfway through its lifespan and still works great. Of course I didn't test the water so I don't know how well it filters, but the water tastes great.
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