Made in the USA by Think Crucial
Pet Fountain Descaler, 25% Citric Acid
Shipping
Free U.S. shipping on every order
Dispatch
Ships in 1–3 business days
Works
Not sure? Ask us before you order
Returns
Unopened bottles: 30-day returns
The spec sheet.
- Size
- 8 fl oz
- How often
- Every month · Catit: clean its fountain pumps monthly (its guide says every 2 weeks)
- Made by
- Think Crucial
When to replace it.
What owners say.
On thinkcrucial.com
On Amazon
5.0 out of 5 from 16 ratings on Amazon (as of Oct 1, 2026)
Ratings and reviews from Amazon.com for the same Think Crucial product, as of Oct 1, 2026. They are separate from reviews on this site and aren't counted in them.
Before you order.
Shipping, returns and fit work the same on every product.
Q01Will it work with my machine?
Email support@thinkcrucial.com with the model number from your machine's label before you order, and we'll tell you whether it suits it.
Q02Is this made by the machine's brand?
No. It's made by Think Crucial. Always follow your machine maker's own instructions.
Q03What if it doesn't work, or I change my mind?
Unopened bottles can be returned within 30 days of delivery. For safety we can't take back opened bottles.
Q04When will it arrive?
Shipping to U.S. addresses is free on every order. It ships from our fulfillment center in 1–3 business days and arrives in 3–7 business days.
Q05Is there a subscription?
No. You buy one when you need one. Nothing renews and nothing auto-ships.
We make what we sell.
Think Crucial started in 2007 at a family vacuum repair shop. Today we make our own descalers and cleaners here in the USA, plus aftermarket filters, bags and parts. Each one says what it's for.
- Find the model number on the rating label
- Match it to the list on this page
- Not listed? Ask us before you order
Ready to order
Pet Fountain Descaler, 25% Citric Acid
$24.99Free U.S. shipping
Unopened bottles: 30-day returns.
Full product description
A pet fountain that has slowed to a trickle almost always has the same problem: calcium scale on the pump impeller and inside the tubing. Tablets rinse loose residue off the surface. They do not give you the contact time that actually breaks mineral buildup down.
This is a liquid concentrate. One teaspoon in 32 oz of warm water gives you a soak that reaches a low enough pH to dissolve hard-water calcium over 20 to 60 minutes, with no scrubbing. Three ingredients, unscented, and up to 47 cleanings per 8 oz bottle.
Features:
- Fits most recirculating fountains – Works with Drinkwell, PetSafe, Catit, Pioneer Pet, PETLIBRO, IPETTIE, Veken, Kastty and other pump-style fountains.
- Dissolves scale a tablet cannot – 25% citric acid reaches a low pH at use dilution and soaks parts for 20 to 60 minutes — the contact time that breaks down calcium buildup.
- Up to 47 cleanings per bottle – One 8 fl oz bottle covers up to 47 full sessions at the 1 teaspoon dose, which is a multi-year supply at monthly cleaning.
- Soak, do not scrub – Safe for hard plastic, ceramic and stainless steel fountain parts.
- Three ingredients, unscented – Citric acid, sodium citrate and water. Made in the USA.
How to use:
- Disassemble the fountain and discard the old water.
- Add 1 teaspoon of concentrate to 32 oz of warm water.
- Soak hard plastic, ceramic and stainless parts for 20 to 60 minutes.
- Rinse all parts three times with fresh water before reassembling.
Rinse thoroughly before returning the fountain to your pet.
Why Think Crucial:
- US-based, family-owned brand serving over 1,000,000 households since 2007
- Replacement parts, filters and cleaning solutions for commonly used appliances
- Customer support available if a product does not perform as described
Think Crucial is an independent brand. Brand and model names are used to show compatibility only; this is a Think Crucial product, not made by the appliance manufacturer. If it doesn't work with the machine we list, email us and we'll refund it. Always follow your appliance manufacturer's own cleaning and descaling instructions.
Brand and model names are used only to show compatibility. Think Crucial is an independent brand, not affiliated with those manufacturers. Always follow your machine maker's own descaling instructions.