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Replacing the filter was a cinch and the activated carbon layer actually made the water taste noticeably fresher within the first day. My cat's been drinking way more since I swapped it in, which is exactly what I hoped for.

Swapping these in takes seconds and the fountain runs noticeably quieter once a fresh one's in. The three-layer setup with activated carbon and ion exchange resin gives me peace of mind about what's actually getting filtered out.

Our cat drinks way more water now that the fountain stays fresh, and I think the activated carbon layer is doing the heavy lifting. The three-stage setup (cotton, carbon, resin) actually feels like it filters something instead of just catching hair.