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

Sleep Shaming or Bio-Hacking: The Science of Feline Polyphasic Sleep

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

Why Is My Cat’s Jaw Clicking? Vet-Approved Explanation!

You have heard people claim that dogs are a man’s best friend, but what about cats? Yes, they are smaller than most dogs,...

Can Cats Eat Capers? Vet-Reviewed Facts & FAQ

Capers are known for adding a certain “pizazz” to many meals including pasta, salads, fish, and bagels. These small and savory flower buds...

8 DIY Free Automatic Cat Feeders You Can Build Today (With Pictures)

Are you considering getting an automatic cat feeder but can’t decide if it’ll be the solution you and your cat need? Automatic cat...

More related

Can Cats Eat Dog Pill Pockets? Vet-Reviewed Facts & FAQ

Unfortunately, almost all cat owners experience times when their cats are prescribed medication for a health condition. Cats don’t generally enjoy eating things...

Japanese Bobtail Longhair: Info, Pictures, Care, & Traits

Japanese Bobtail Longhairs are a gorgeous longhaired version of the traditional Japanese Bobtail. These kitties have easy-to-maintain long, silky coats and the trademark...

500+ Savannah Cat Names: Great Ideas for Your Exotic Cat

Savannah cats are incredible specimens, providing an exotic quality to domestic life. They definitely fare best in a cat-savvy home with owners who...

Can You Shave a Cat With Human Clippers? Facts to Consider & Tips

Sometimes a cat might need shaving. While this is pretty rare, you might find yourself needing to clip your cat’s coat for a...

Keep reading

Arm and Hammer Cat Litter Review of 2025: Recalls, Pros & Cons

Review Summary Introduction Cat litter is an essential item on any cat owner’s shopping list, and most of us have heard of Arm & Hammer, a brand that has been on shelves for over 170 years. All Arm & Hammer...

Arm & Hammer Cat Litter Review

Can Cats Eat Mayo? Vet-Reviewed Nutrition Facts & Advice

Mayo is a condiment that can be found in many people’s pantries and refrigerators. But what about cats? Can cats have mayonnaise? While it may add some flavor to food, it’s not a good idea to add mayo to your...

Can Cats Eat Mayo

Why Is My Spayed Female Cat Yowling? 6 Vet-Reviewed Reasons & Solutions

If you’ve recently had your female cat spayed, you might’ve thought it would remedy her yowling. Once several weeks have passed, your cat is no longer in post-operative recovery and is no longer experiencing heat, so she would have no...

Cat with mouth wide open

Can Cats Carry Bed Bugs? Vet-Reviewed Info, Risks & What to Do

Bed bugs are a major public health problem. Many people associate them with the filthiest, most run-down apartments, but the truth is that these pests are not specifically attracted to dirt, and they can be found in many places. However,...

vet holding magnifying glass searching cat fleas over a grey and orange cat

Dealing With an Aggressive Cat? 7 Reasons Why Cats Become Aggressive

Even the most experienced cat caretakers can find themselves charged up on adrenalin when having to face a cat in the midst of a fit of aggression. But encountering a hissing, growling, screaming, and possibly even scratching and biting cat...

owner petting a hissing angry tabby cat

Do Neutered Cats Spray? Vet-Reviewed Behavior

Cats are wonderful companions, but they do exhibit some quirks that must be dealt with accordingly. One common problem among cat-owning households is spraying, or urine marking. This can be frustrating, smelly, and a real hassle to clean up. While...

black male cat spraying at the garden

Osteochondrodysplasia in Scottish Folds: Vet Approved Signs, Causes & Care

Scottish Fold cats are sweet, mellow, laid-back, and fun. They’re known for their folded ears, chubby faces, and sweet temperaments. The breed’s folded ears are related to a genetic mutation that causes skeletal and joint deformities. Cats with folded ears...

vet holding a senior cat

Why Do Cats Like Wet Hair? 9 Vet-Reviewed Reasons

Cats do a lot of things that we consider a bit strange. How many cat owners have woken up in the middle of the night to find their cat staring at a spot on the wall and there’s nothing there?...

a woman holding a cat that's licking its mouth