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Home›Shop›Hydration & Feeding›Replacement Filters · 6 pack
Hydration & Feeding

Replacement Filters · 6 pack

★★★★★4.8 · 1,097 reviews
$19.90

In stock · ships within 24 hours

Six filters. One per month, roughly. The most common reason a fountain starts smelling is a filter nobody replaced — so we made the replacement cheap and obvious.

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Contents6 × carbon + foam cartridges
FitsDock Fountain (all generations)
Change intervalEvery 4–6 weeks
Subscription15% off, cancel any time
MaterialCoconut-shell carbon, food-grade foam
🚚 Free US shipping over $49 ↩️ 30-day returns 🛡️ 1-year warranty
6 × carbon + foam cartridges — see full contents below. Includes USB-C cable and quick-start card.
Ships from our US warehouse within 24 hours. Standard delivery 3–5 business days, express 1–2. If your pet simply refuses it, return within 30 days for a full refund — used is fine.
One year on hardware. We replace rather than repair for the first 12 months — no shipping cost to you.
Every 4–6 weeks, or when the fountain shows amber.
Yes, all Dock generations use the same cartridge.
The foam yes, the carbon no. Bin the carbon, compost the foam.
Any time, from the account page. No phone call.

Why we built it this way

The details that do not fit in a bullet list.

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Why carbon

Coconut-shell carbon has a higher surface area than the coal-based alternative, which matters for odour.

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Subscribe is optional

We do not lock it behind a plan. Buy once, or subscribe and cancel in two clicks.

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A reminder that works

The fountain itself tells you — the light turns amber at 400 hours of runtime.

♻️

Recyclable packaging

Cardboard only, no plastic bag inside.

What owners say

★★★★★

"I was sceptical about anything with an app. This one just worked out of the box and I have not opened the app since week one."

Helen K.Portland, OR · Verified buyer
★★★★★

"Bought it for a two-week trip. Came home to a cat that was genuinely relaxed instead of furious. Worth every cent."

Tom A.Chicago, IL · Verified buyer
★★★★☆

"Only complaint is I wish it came in more colours. Functionally though, exactly as described."

Renee M.Austin, TX · Verified buyer
Bundle and save 20%The Empty-House Kit combines this with a NovTag and six months of bags.
See the kit