Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

How Often Should You Change the Water in a Cat Water Fountain? Vet-Verified Facts & Care Tips

Hepper Water Fountain - Himalayan Persian White

If you struggle to get your kitty to drink water, you may have purchased a cat water fountain to encourage them to stay hydrated. The constantly running water may be more appealing to your cat than a bowl of water. While the movement helps the water stay fresher, you should still change the water in your cat’s fountain at least once a week based on the manufacturer’s recommendation. However, you should change it more frequently if you have multiple cats.

In this article, we’ll cover how to know when to change the water in your cat’s fountain and the other steps you should take to keep it clean and sanitary. We’ll also discuss other strategies to encourage your cat to drink more and why keeping your pet hydrated is vital.

divider cats oct 2024

How to Decide How Often to Change the Water in Your Cat’s Fountain

Several factors help determine how often you should change your cat’s water in a fountain.

First, how many cats are using the fountain? The more cats that drink from the fountain, the faster the water disappears and the quicker it gets dirty with debris. If you have multiple cats, you may need to change the water as often as every 2–3 days.

You should also consider the manufacturer’s recommendation for the water fountain. Cat water fountains usually come with filters that keep the water clean, but they all work a bit differently. Read the directions for your fountain to find out how often the company recommends the water be changed.

Finally, examine the water in the fountain. Does it look cloudy, dirty, or slimy? If so, go ahead and change it.

cat water fountain
Image Credit: Creative Cat Studio, Shutterstock

How to Keep Your Cat’s Water Fountain Clean

Any vessel that holds water will eventually develop slime and mold if not cleaned regularly. To prevent this problem in your cat’s water fountain, clean it thoroughly at least once a week. Follow the manufacturer’s recommendation for cleaning based on the type of water fountain you have.

Some parts of your water fountain may be dishwasher safe, while others will need to be hand-washed. When you clean the fountain, replace the water completely. If your water fountain has a filter, change it according to the recommended schedule, usually every 2-4 weeks.

Cats can be very particular about many things, including the water they drink. The right water fountain can provide your cat with clean, fresh water.

Hepper Stainless Steel Cat Water Fountain
  • Premium 304-Grade Stainless Steel - This metal cat water fountain is hygienic, with superior...
  • Serene & Healthy Cat Drinking Fountain Experience - With whisper-quiet pumping & an advanced...
  • Say Goodbye to Dehydration - Provide your cat with a constant source of flowing water with this...

We recommend Hepper's Stainless Steel Cat Water Fountain, an easy-to-clean model with three different flow modes, a large capacity, and effective triple filtration. This minimalist fountain runs quietly and will fit right into your home.

At Catster, we’ve admired Hepper for many years and decided to take a controlling ownership interest so that we could benefit from the outstanding designs of this cool cat company!

Why Is It Important for Your Cat to Drink Water?

Cats will drink different amounts of water depending on what they are fed as well as their size, activity levels, and health. Wet food contains 70-80% water, so if your cat regularly eats wet food they will need to drink less water.

Cats need to stay hydrated and just like us, they can get dehydrated if their water intake is not enough for the fluids they are losing. This can be if they are unwell and not eating and drinking as much, or it can be caused by illness and increased loss of fluids like vomiting or diarrhea. The signs of dehydration will vary depending on the severity but can include:

  • Dry gums
  • Decreased skin elasticity
  • Sunken eyes
  • Weakness
  • Constipation

If you are concerned your cat is not drinking enough or they are showing signs of being dehydrated or unwell then contact your veterinarian.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

Other Tips to Encourage Your Cat to Stay Hydrated

Not all cats enjoy drinking out of a water fountain. Some dislike the noise or find the process strange and unfamiliar. To help these cats stay hydrated, you’ll need to try different strategies.

First, you can experiment with different types and locations for your cat’s water bowls.

Try glass, ceramic, or metal bowls in various sizes and shapes, plastic bowls can taint the water. Place multiple water bowls around the house at various heights, including on counters, tables, and the floor. Cats prefer not to drink water that is near their food or toileting area. Change the water in the bowls daily and keep them clean to prevent slime buildup.

You can add a few drops of tuna juice or unsalted chicken broth to your cat’s water on occasion to encourage water intake.

Another option is adding canned food to your cat’s diet or switching from kibble completely.

divider cats oct 2024

Conclusion

Depending on how many cats you have and the specific recommendations for your cat water fountain, you should expect to change the water every 2–7 days. Cats usually don’t like drinking dirty water, so there’s not much point in switching to a water fountain if you let the water get dirty.

If your cat suffers from health issues like diabetes or urinary tract disease, they must drink plenty of water. Talk to your vet about monitoring your cat’s water intake and additional strategies to ensure they stay hydrated.

Related Reads:

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

When to Euthanize a Cat With Feline Leukemia: Vet-Reviewed Advice

Feline leukemia is a serious disease that can cause a wide range of signs in cats, including anemia, weight loss, and infections. Unfortunately,...

10 Best Ringworm Shampoos for Cats in 2025: Reviews & Top Picks

Ringworm is an annoying fungal infection that our cats may develop from time to time, and even worse, it can spread to us....

Why Do Mother Cats Attack Their Older Kittens? 4 Vet-Reviewed Reasons

Queens occasionally reject kittens who appear to be ill or spend less time caring for weaker ones when they have particularly large litters...

Valor the Blind Kitten Lives Up to His Name

Originally published on Jul 24, 2013 and republished in remembrance of Valor who passed away in May 2022. There was obviously something wrong...

More related

My Older Cat Is Playing Rough With My Cat, Is That Normal? Vet-Reviewed Facts & FAQ

Cats seemingly never grow up. Even the eldest of cats is known to have a little fun now and then, swatting a fly...

Shedmonster Cat De-Shedding Tool Review 2025 – Pros, Cons, & Verdict

Review Summary Oster is among the most recognizable names in pet care and produces grooming products built around ease of use and durable...

100+ Tortoiseshell Cat Names: Great Ideas For Your Cute Cat

Tortoiseshell cats are a lovely shade of black, red, and orange and are almost always female. The tortoiseshell cat is not a specific...

Can Cats Eat Roses? Vet-Reviewed Safety Facts & Information

Have you ever walked into your rose garden and caught your cat nibbling on rose petals? Or perhaps you’ve found them snacking on...

Keep reading

Why Do Cats Like Their Ears Rubbed? 5 Vet Reviewed Reasons

When you pet your cat, you’ve likely noticed that they want more of it. But why is it that cats like it when you rub their ears, how can they tell you they like it, and what are some other...

cat with a ear hematoma

Why Is My Cat Eating Cat Litter? 10 Vet-Reviewed Reasons

Cats are capable of doing many things that leave us feeling bewildered and scratching our heads. It’s often challenging to figure out if something that’s strange to us is actually normal for cats. When it comes to eating cat litter,...

cat sniffing cat litter in the box

Is Your Cat Vomiting? Try These Gentle Vet-Approved Diet Fixes

Watching your cat throw up is scary, and the wrong food can make things worse. When your feline friend’s stomach is upset, choosing the right diet becomes a delicate balancing act. But don’t worry, with a few smart moves, you...

a cat that feels sick and seems to vomit

Why Does My Cat Purr When They’re Asleep? Vet-Reviewed Feline Behavior

Is there anything sweeter than seeing a cat curled up in a cozy nook, purring in their sleep? We can’t think of much that beats it. But if you’ve ever wondered why cats purr in their sleep—and if they’re really...

cat under porch sleeping

Can Cats Control Their Tails? Vet-Verified Positions & Movement Explained

Cats use their tails to communicate to the world through body language. You can tell a lot about a cat’s disposition by what their tail is doing. With that being said, cats have full control of their tails. The tail...

tail of a cat on vintage background

Canidae Cat Food Review of 2025: Recalls, Pros & Cons

Review Summary Canidae truly started as a labor of love. The company’s two founders, Scott Whipple and John Gordon, met in a pet food store owned by Whipple. The two men bonded over their love of animals and their dissatisfaction...

Canidae Cat Food Review

Wellness Cat Food Review of 2025: Recalls, Pros & Cons

Wellness Cat Food Review Summary Started in 1997 by a team of animal wellness experts, including nutritionists, veterinarians, and food scientists, Wellness Pet Food is the largest holistic pet food sold in independent retailers today. Whenever possible, the company strives...

Wellness Core Cat Food Review

Are Croton Plants Toxic to Cats? Our Vet-Approved Advice

The croton (Codiaeum variegatum) is a popular houseplant. This leafy, ornamental plant is native to tropical areas but adapts well indoors. But if you have a cat, this isn’t a plant you want in your home. All croton varieties—including evening...

Catster_Are Croton Plants Toxic to Cats