The amount of charcoal in the bag is tiny and I was aware of this before buying from other comments and didn't find it a problem because I could just stack a lot of it in the bag. But now that I've got it I understand why this is actually a problem: I would have to fold so much that the paper content would be very high and: 1. Since it's a cheap product from China, there's nothing to display that this paper is good for health. The water flows mainly through the paper and not through the charcoal. In the end I just threw it away because I don't think the water gets any cleaner with filters than without. PS: The paper looks completely different from the photo. In the photo it looks like some kind of special fiber paper or something potentially useful. It's actually cheap plain paper.
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