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

Tremors in Cats: Our Vet Discusses Signs, Causes & Treatment

While the jitterbug may have been a popular swing dance among humans, it’s important to remember that cats don’t normally jitter, the dance...

Maine Coon Kittens for Sale in California: Breeders List 2025

Catster advocates for adopting before shopping, though we fully understand there are many reasons for seeking a breeder. So, we encourage it to...

What’s an F1 Savannah Cat? What Are They Like?

F1 Savannah cats are first-generation Savannah cats. In other words, they are 50% serval and 50% domestic cat. The “F” stands for filial...

Cat Doesn’t Drink Water But Eats Wet Food: Vet-Verified Concerns, Facts & FAQ

Water is vital for cats because it enables their bodies to function properly and promotes their overall well-being. Cats that eat wet food...

More related

Meet Jesperpus, Confident Outdoors-Loving Cat of Norway

Jesperpus is a dashing ginger cat born in August 2013 and who has since become a fan favorite on the social media scene....

How to Get a Feral Cat to Use a Shelter: 8 Vet-Reviewed Tips & Considerations

Feral cats scare some people, but when you’re a cat lover, you want to do everything you can to ensure the cats are...

Can Cats Eat Sweet Potato? Vet-Verified Facts & Feline Nutrition Tips

Sweet potatoes seem to be gaining traction in the pet food world. You may have seen dog foods advertised with sweet potato as...

Ginger Cat Appreciation Day 2025: How and When Is It Celebrated?

Ginger Cat Appreciation Day comes around every year on September 1st. Chris Roy came up with the idea to commemorate his sweet 15-pound...

Keep reading

Can Cats Eat Pineapple Leaves? Vet Reviewed Dangers & Advice

Pineapple lovers know the leaves and skin of their favorite fruit have no place in their diet, but cats are rarely as discerning. Many cats enjoy chewing greenery for one reason or another, often not taking the time to check...

Can Cats Eat Pineapple Leaves

Why Does My Cat Lick My Lips? 10 Likely Reasons

Having a cat as a family member can bring you love, adventure, and even confusion. We may never fully understand cats and some of their antics, but it’s clear cat lovers welcome most of them with open arms. When your...

Gray cat licking owners face

How to Get Your Kitten to Like Water: 4 Vet-Reviewed Methods

A popular complaint among pet cat owners is that their cats don’t appreciate baths and are not cooperative when it comes to being given baths. Though there are many possible reasons that a cat may have an aversion towards baths,...

british shorthair cat peeps from the bathtub

Do Feral Cats Hunt In Groups Or Share Their Kill? Facts & 3 Ways to Help

Feral cats don’t usually hunt in groups. Most prefer to catch prey on their own, and sharing food is mostly limited to feral moms providing food to their kittens. However, the ways in which feral cats live and hunt varies...

Many feral cats are eating outside

Can Cats Eat Muffins? Vet-Reviewed Risks & Safe Alternatives

Many of us enjoy munching on a muffin from time to time. They are tasty and can fill the gap when you’re hungry between mealtimes. There are so many options, too—blueberry, chocolate, bran, and cranberry, just to name a few!...

Can Cats Eat Muffins

10 Best Cat Toothpastes of 2025 – Reviews & Top Picks

Oral hygiene plays a significant role in the overall health of our feline friends. As humans do, cats also need a regular dental hygiene routine to keep their teeth and gums in top condition, prevent tartar buildup, and freshen their...

cat getting teeth brushed

How to Calm a Scared Kitten: 7 Vet-Reviewed Methods

Bringing home a new cat is a magical time for you, but have you ever stopped to think about how it might appear to your kitten? After all, they’ve just been carried into a strange new environment by an unknown...

scared kitten hiding

Are Poppies Toxic To Cats? Vet Approved Facts & FAQ

Cats are intelligent creatures that usually avoid things that can hurt them. However, sometimes curiosity gets the best of them, and if your cat decides to eat some plants, including poppies, they can harm them. Poppies are used to make...

Catster_Are Poppies Toxic to Cats