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Has anyone used them for 3d printing air filtering and suggest which to buy?

I’ve been using coconut shell activated carbon for my water filter setup and it’s worked really well—tiny pellets, low dust, and doesn’t clog like some cheaper granulated versions I tried before. It's good at pulling out smells too. I grabbed mine from Aquacadabra since the bulk pack was decent value and arrived quick. Just make sure to rinse it before use or you’ll get black water for the first few flushes.