Fountain Cube C

The slime-resistant layer is no joke—I used to scrub the basin every three days and now it's more like once a week. Water tastes cleaner too, my cat drinks way more of it.

Swapping this into my fountain took about three seconds with no tools, which is honestly the main reason I keep buying it. Water tastes cleaner and there's noticeably less gunk on the pump, though I do wish each cube lasted a bit longer before needing a change.