Review on Catit Design Replacement Filtering Cartridge by Kate Windish

When I bought the Catit fountain it came with one of these and worked great. But something changed in the design and the replacement bag I bought got clogged causing water to settle on top of the fountain. I examined the first one that did, washed it off, tried again and a few days later same thing. Tried the second one in the pack, same problem. The charcoal seems to be sticking together, or maybe something else in the filter (not quite sure what it's called) is sticking together and not letting water through. I hope I just have a bad box, I'll buy more and update my rating. **UPDATE** I bought another pack, same problem. I also bought another variety that Catit offers (they are gray and thin with no various nutrients), they work a little better and a little longer, but still clog more than the original.