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

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

Who Moved My Cheese? Ways to Help a Cat Through Change

Hi, I’m Dr. Lauren! Read my introduction to learn more about me and my two adventurous cats, Pancake and Tiller. Cats and cheese....

Amoxicillin for Cats: Our Vet Explains Uses, Doses & Side Effects

Amoxicillin is an antibiotic that is prescribed to cats for various infections (from skin infections to UTIs and pneumonia). It has a broad...

Can Cats Drink Milk? Vet Approved Nutrition Facts & FAQ

Cats drinking a saucer of milk or cream is something we can all picture. Cats have been drinking milk in advertisements, cartoons, and...

Cat-in-the-Bag Cat Carrier Review of 2025: Pros & Cons

Review Summary Cat-in-the-Bag is the creator of a one-of-a-kind cat carrier bag. It makes traveling much easier, as well as nail-trimming, medicating, or...

More related

What’s the Price of Spaying or Neutering a Cat in Canada? 2025 Costs

If you don’t want to breed cats, it’s essential to consider a spaying or neutering procedure. While felines aren’t as expensive to own...

At What Age Can Cats Have Catnip? Vet-Reviewed Facts & FAQ

Catnip is a popular plant-derived treat for cats, and it’s easy to find in pet stores and even grocery stores. However, many pet...

Perfect Kitty Frenemies: Ivy and Her Orange Friend

Welcome to the Wednesday Cats of Catster! Every week, we share a story from one of our cat-loving Catsters. This week is about...

Why Do the Japanese Love Cats? Country Obsession Explained

No country loves cats quite as much as Japan. One look at Japanese art, literature, or media, and you’ll see just how true...

Keep reading

Do Cats Feel Sad in the Same Way Humans Do? Vet-Reviewed Feline Behavior

A cat’s brain is very complex, and very similar to a human’s brain in some ways. This enables them to experience a range of different emotions, such as sadness, anger, fear, joy, and surprise. However, cats will not show emotions...

sad looking cat lying on a table

Is Catnip Safe for Kittens? Vet-Reviewed Facts & FAQ

In a way, catnip is as much a treat for doting pet parents as it is for their feline family members. We may not get the same euphoric benefits, but it feels good to know we can offer an extra-satisfying...

Catster_Is Catnip Safe for Kittens

10 Behavior Problems in Cats: Vet-Verified Prevention & Solutions

Cats are quirky, funny, loving, and adorable animals that we love sharing our lives with, but at times, mischief is afoot! Sometimes, though, that mischief borders on behavioral problems. Keep in mind that some cat behaviors might be perceived as...

cat pee on carpet

Can Cats Eat Shrimp? Vet-Reviewed Facts & FAQ

So, you know your cat loves fish, but she seems to be drawn to that shrimp you’re enjoying. Naturally, this will lead to your wondering if cats can eat shrimp. Is shrimp safe for your cat to eat? The short...

Can Cats Eat Shrimp

Can Cats Eat Cheese? Vet-Approved Facts & FAQ

Cheese is a food long associated with being a feline favorite, and while cheese isn’t toxic to cats, various ingredients within it, primarily the dairy content, are not good or healthy for cats and may instigate problems. A small piece,...

Can Cats Eat Cheese

How to Tell if Your Cat Has a Tick – 8 Signs to Look For

Ticks are nasty little parasites that feed on blood. They’re in the same category as fleas and mosquitoes and can cause health problems for your cat if left on the body. So, you definitely want to remove a tick as...

cat with tick

Are String of Turtles Toxic to Cats? Vet-Reviewed Safety Tips & Facts

If you’re a cat parent and plant enthusiast, you know that it’s vital to choose your plants according to your liking and while considering your feline’s safety. Unfortunately, many common houseplants are toxic to cats, which is why you need...

What Causes Sudden Fever in Cats? Our Vet Explains Causes, Signs & FAQ

One of the most frustrating things we face as pet owners is when our furry family members don’t feel well, especially when we don’t know why. Fevers can be especially difficult to diagnose and treat because there often isn’t an...

digital thermometer showing a cat has a fever