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 to Cat-Proof a Fish Tank: 7 Tips & Tricks

Share

black cat looking at the aquarium fish

Cats are drawn to quick, darting movements, and the colorful fish in the tank in your living room never fail to awaken their hunter’s instincts. Unfortunately, our cuddly kitties are never satisfied with admiring the glittery scales from afar.

More often than not, you’ll find your cat exploring places that you didn’t know that they could get to. While your cat might be well-behaved when you’re in the room, your fish are unprotected when you’re away. To reduce the risk of stressing your fish too much, here are seven ways to protect your fish tank from your cat.

divider cat paws 2 oct 2024

How to Cat-Proof a Fish Tank

1. Aluminum Foil

Stopping your cat from jumping onto surfaces is easier said than done, but there are ways to convince them to leave the tank alone. You can place sheets of aluminum foil underneath the fish tank or on top of it. That way, when your cat jumps up, it’ll crinkle beneath their feet. Most felines don’t like the sound that the foil makes, and it’ll ward them off.

Replacing the aluminum foil can get expensive if your cat jumps on it repeatedly. Depending on how often your cat jumps up, you may have to replace the torn sheets more often.

Pros
  • Cats don’t like the crinkling noise
  • Easy solution
Cons
  • Aluminum foil can be expensive
aluminum foil
Image by: Rupert Kittinger-Sereinig, Pixabay

2. Cat Repellent

Some odors can encourage your cat to stay away. Citrus, like lemon, lime, and orange, is a scent that felines tend to avoid. You can also buy commercial cat repellent sprays, but some brands require you to reapply the treatment when the scent dissipates.

You can also get specially designed mats to deter cats. They work by using static-like pulses of low-powered electricity. While it’s harmless to your cat and will convince them not to jump on the aquarium, some owners consider electric deterrents cruel.

Pros
  • You can make deterrent sprays at home
Cons
  • Not all scents are cat-safe
  • Some owners dislike using electric deterrents

3. Cover the Tank

Part of the reason that cats are so interested in fish tanks is the sight of the bright, colorful fish with their darting movements. If you’re out of the house, nothing will prevent your kitty from venturing closer to pester your fish.

One solution is to cover the tank when you’re at work or sleeping. You can use towels or an old blanket. However, there is a downside to covering the tank.

If you have a cat that likes to play with dangling fabric—curtains or a sweater on the back of a chair—they may pull down the whole thing. Make sure the tank and the blanket are secure. You could also use cardboard to cover the glass.

Pros
  • Hides the fish from sight
  • Recycles old blankets or cardboard
Cons
  • Some cats will play with the blanket
cat at the top of the aquarium
Image by: Maleo, Shutterstock

4. Create a Distraction

Distracting your cat can be handled in several ways and paired with other solutions for the best results. Leaving toys for your cat to play with while you’re at work can help. Puzzle toys, where they have to find the treats inside, will keep their attention off the fish in the tank.

Placing a cat tree next to a window overlooking your garden, if you have one, can help, too. The location will give your cat somewhere to sit while watching the birds visiting your yard.

Pros
  • Works while you’re away
Cons
  • Cat trees and toys can be expensive

5. Lidded fish tanks

Not all fish tanks come with lids, but the ones that do are useful for many reasons. The lids prevent the fish from escaping, keep debris and dust out of the water, and hold LED lights to help aquarium plants grow.

When it comes to your cat, a secure lid won’t stop them from jumping up, but it will prevent them from spending their day fishing. You can’t stop your fish from attracting your cat’s attention, but you can make them inaccessible to your kitty.

Pros
  • Prevents cats from reaching your fish
Cons
  • Doesn’t prevent cats from sitting on or by the tank
a cat sitting near the fish aquarium
Image by: Libre, Shutterstock

6. Shut the Door

When all else fails, leaving the fish tank in a secure room and shutting your cat out is the best method. It’s also the most successful, especially when you’re away at work or asleep. While it might seem cruel to refuse your cat access to one of the rooms in your house, they’ll eventually get used to it.

Without access to the fish they love to bother, your feline will find something else interesting, like taking a nap or playing with a stuffed toy. In the end, shutting the door is the only effective way to keep your cat away from your fish.

Pros
  • Easy
  • Effective
Cons
  • The fish tank needs to be in a room with a door

7. Sticky Surfaces

One solution is to put double-sided sticky tape around the fish tank. Cats are picky about where they place their feet; it’s part of the reason they can be so fussy about the type of litter they use.

If you’ve ever walked barefoot across gravel or a rocky beach, you’ll know how sharp some objects can be to your sensitive feet. Cats are much the same way and will try to avoid surfaces that they don’t like walking across.

Sticky surfaces work simply because cats don’t like how it interferes with their paws.

Pros
  • Cats don’t like having things stuck to their paws
Cons
  • Double-sided tape can collect dirt
man's finger touches double sided tape
Image by: Ekaterina43, Shutterstock

divider 2 cats

Conclusion

As hunting champions, cats will always take notice of prey creatures like fish. Their shimmering scales, bright colors, and darting movements all work to draw your cat’s attention. While it gives your cat something to focus on, your fish won’t appreciate having the attention of a predator.

The tips we discussed are all possible ways to keep your fish tank safe from your cat. Depending on your cat and how persistent they are, some methods will work better than others. When in doubt, keep your cat out of the room entirely and shut the door. Your fish will thank you for it.


Featured Image Credit: DMITRII STARTCEV, Shutterstock

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

What Feral Cats Actually Need From the People Who Feed Them

Feral cats are everywhere. Slipping between parked cars, darting under porches, appearing briefly at dusk before vanishing again. Most people see them, feel...

Capturing Catstanbul

Istanbul – famous for its bustling markets, unique architecture, and vibrant culture, there is one more feature of this Mediterranean capital that deserves...

Ask Dr. Paola – Help! My Male Cat Gets Into Fights! (March 9, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Why Your Cat’s Poop Smells Like a Biohazard

Nobody enjoys litter box duty, but sometimes it gets unbearable. The smell hits you from across the room. You’re scooping faster, lighting candles,...

More related

A Feline Expert Gives Tips on Keeping Cats Hydrated

Unlike dogs, most cats are not big gulpers or slurpers at the water bowl. And we’ve yet to see any feline expert consistently...

Can You Scoop Cat Litter When Pregnant? Concerns & 8 Safety Tips

Welcoming a new baby into the family is an exciting time. Not only are the new parents filled with joy, planning for the...

Are Savannah Cats Hypoallergenic? Vet Approved Facts & Allergy Prevention Tips

As a hybrid between wild African Servals and domestic cat breeds, Savannah cats are gorgeous animals with unique personalities. Because they shed less...

How to Brush Your Cat’s Teeth: 7 Vet-Approved Steps With Video

Dental disease is incredibly common in domestic cats, with experts estimating that between 50%–90% of cats over the age of 4 years old...

Keep reading

How to Tell If a Stray Cat Is Pregnant? 10 Vet-Approved Signs

There are many challenges to taking in a stray cat. First, you need to make sure that they’re healthy and uninjured. Second, you should locate their owners in case they are simply lost rather than abandoned. Unfortunately, many stray cats...

pregnanat ginger cat outdoor

Is Rhaphidophora Tetrasperma Toxic to Cats? Precautions & Risks

The Rhaphidophora tetrasperma, also referred to as the mini monstera, is a beautifully lush plant with small, split leaves that can range in color from bright green to dark yellow. These plants have climbing vines that will grow several feet...

My Cat Killed a Bird: What to Do & Prevention Tips (Vet-Verified)

If you have an outdoor cat, chances are there will be a time that they bring you a dead bird. This experience is unpleasant and certainly not something you would like to repeat. So, what do you do now? First,...

cat and bird

Does Apple Cider Vinegar Help Upper Respiratory Infection in Cats?

Apple cider vinegar is often praised for its health benefits, and many people will use it as a holistic remedy for certain ailments. Apple cider vinegar is safe for cats, and it may help with some mild cases of upper...

apple cider vinegar in a bottle

Do Persian Cats Shed? Vet-Verified Facts & Grooming Tips

If you have had your eye on the beautiful Persian cat, you may wonder a little about the grooming. After all, one of the best qualities about this cat is their long, lustrous fur. With coats like that, they are...

Persian cat and a pile of cat hair

Do Female Cats Spray? Vet Approved Facts & FAQ

It’s a common misconception that only intact male cats spray. The truth is spraying is not a sex-specific feline behavior. Female cats can and do spray. Having a female cat that sprays at home can be frustrating, especially if you...

a white cat spraying the wooden gate

7 Best Cat Foods for Weight Gain (High Calorie) in 2026 – Reviews & Top Picks

Some cats are notoriously picky. No matter what food you put out for them, they turn up their noses and walk away from the food bowl. With hundreds of products available, you may struggle to select the right one for...

persian cat eating dry food from bowl

How Many Kittens Can a Cat Have? Vet Verified Facts & FAQ

Kittens can be a ton of fun, but they’re also a lot of work. There are health risks to your cat during and after her pregnancy, and her kittens will need care until they’re old enough to go to their...

mother-cat-and-her-babies

Love Cats? So Do We! Join the Catster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Catster Email Newsletter

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.