Tired of changing filters often? Get this handy 12-pack of replacement filters made just for 2.5L (84.5 fl oz) cat water fountains – especially the popular whiskers-style models. These filters aren’t just basic sponges – they combine a cotton layer, activated carbon, and ion exchange resin to catch hair, debris, and even heavy metals, so your cat drinks cleaner, fresher water.\n\nEach filter measures about 3.3 inches long and wide, with a 0.6-inch hollow circle and 0.38-inch thickness – a perfect fit for compatible fountains. Pro tip: soak the filter in water for 2 minutes and rinse it well before first use to wash away any loose carbon dust (totally safe, but better to rinse off!).\n\nWe recommend swapping filters every 2–4 weeks, depending on how many pets use the fountain. Keep the water crisp and inviting for your furry friends. And don’t worry – we stand by our quality with a 30-day money-back guarantee. If anything’s not right, reach out to our support – we’ll reply within 24 hours.\n\nGreat for multi-cat homes, busy pet parents, or anyone who wants low-maintenance hydration for their cats. Easy to install, lasts for weeks, and keeps that fountain running smoothly.