After 2-4 weeks, your filter stops removing impurities and starts collecting them. Bacteria, slime, and buildup accumulate in the very thing that's supposed to keep your cat's water clean.

Your cat notices before you do. They'll drink less. Or stop entirely.

That's when the real problems start:

• Chronic dehydration
• Urinary tract infections
• Kidney disease (affects 1 in 3 cats)

The fix takes 30 seconds. Swap your filter every 2-4 weeks and the water stays fresh, your cat stays hydrated, and you never have to think about it.