I remember being terrified when I saw little bugs in my cat, Muezza’s water fountain. It made me filled with doubts and utmost disgust toward those hideous insects. However, I pulled myself together and dealt with them.
So, are little bugs in cat water fountains harmful? Yes, the presence of bugs in your cat’s water fountain can compromise your cat’s health. Some cats might become lethargic when infected, but others can develop severe issues. Gastrointestinal (GI) infections, diarrhea, vomiting, and even more serious conditions like septicemia or urinary tract infections (UTI) are possible.
Moving on, I will tell you more about the potential harms of these nasty bugs in water fountains. Moreover, I will provide additional information to help you effectively manage this situation.

Are Little Bugs in Cat Water Fountains Harmful?
Little bugs in a water fountain aren’t something to be taken lightly because they can significantly risk your cat’s well-being. Cats can become infected by various contaminants, including bugs, present in their drinking water. The symptoms of this infection can be mild or severe, depending on the type of bug or pathogen.
Furthermore, this issue poses an even greater risk for vulnerable little kittens, who are comparatively more fragile and prone to infection. These issues should be tackled immediately. Otherwise, your cat could end up with a very weak immune system, making them susceptible to other illnesses. A weak immune system can never be a good sign, be it a cat or a human.
So, if you notice any changes in your cat’s behavior or in their water fountain, don’t hesitate to contact your veterinarian immediately. Timely veterinary attention could save them from a great deal of pain and prevent severe health complications. As a responsible cat owner, the best thing you can do is observe your cat’s behavior closely. These bugs can impact the way your cat is feeling and behaving. As previously mentioned, lethargy is a common symptom, but your cat might act out in different ways too. Muezza wasn’t feeling her best when this happened to her.
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Types of Bugs in Cat’s Water Fountain and Their Consequences

Understanding the various types of bugs and contaminants you might find in your cat’s water is crucial for effective treatment and prevention. Bugs in your Muezza’s water can vary, and knowing what you’re dealing with helps in addressing the problem effectively.
1. Gordian Worms (Horsehair Worms)
These are white parasitic worms that prefer to stay in a water source until they find a host. They are slender and can be as long as up to 24 inches.
While generally not parasitic to mammals like humans or common pets, accidental ingestion of Gordian worms by cats can still lead to gastrointestinal upset.
Drinking Gordian worm-infested water can cause symptoms such as diarrhea and vomiting for your cat.
2. Roundworms
Roundworms have a white to brownish color, with large round bodies typically three to six inches long.
Once ingested, these highly parasitic worms will disrupt your cat’s digestive system, causing a range of symptoms. Vomiting, coughing, diarrhea, and weakness are common with these types of worms. If left untreated for a long time, your cat can experience significant weight loss, potentially leading to other issues like a poor growth rate and a pot-bellied appearance.
Fortunately, roundworm infections are treatable with appropriate medical intervention from a veterinarian.
3. Larvae (Mosquito, Drain Fly, and Others)
If you notice little black bugs that resemble tiny wiggling threads, they are most likely mosquito larvae. While generally not directly parasitic to cats, their presence indicates stagnant water, which can harbor harmful bacteria and protozoa. Mosquitoes are also vectors for various diseases, so eliminating their larvae is important for overall household hygiene.
Black bugs could also indicate drain fly larvae. These are typically harmless to cats but signify poor sanitation in or around the fountain, which can attract other, more harmful pests and bacteria.
You might also notice little red bugs, which could be the larvae of various other insects. Though some may be harmless to cats, any larvae in your cat’s drinking water is undesirable and can indicate a lack of proper hygiene. It’s essential to thoroughly clean the fountain to eliminate all larvae for your cat’s health and your own.

What to Do If My Cat Ingested Bugs or Contaminants?
If your cat ingests bugs or contaminated water and experiences mild symptoms like a bit of drooling, a single episode of diarrhea, or vomiting, you don’t necessarily have to worry excessively, as these may clear up on their own. However, if symptoms persist for more than a couple of days, worsen, or if your cat shows signs of severe illness (e.g., lethargy, prolonged vomiting, blood in stool), you should immediately contact your veterinarian.
Your vet will examine your cat to determine the cause of their symptoms and check for any diseases associated with parasite ingestion or toxicity. Be prepared to provide a detailed health history of your cat, including recent changes in behavior, diet, and water intake.
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How to Get Rid of Bugs in a Cat’s Water Fountain?
As responsible cat owners, we all know the importance of replacing the water in our cat’s fountain at least once a day. However, this is a crucial reminder to clean the cat water fountain regularly and thoroughly. Aim to dismantle and wash the fountain’s interior and components at least once a week. A comprehensive deep clean, where you scrub all parts, should be done at least once a month. To get rid of any larvae or biofilm build-up, you can use pet-safe enzyme cleaners available in stores.
You can also make a simple homemade cleaning solution: just pour some white vinegar, a tablespoon of baking soda, and warm water into the water fountain, let it sit, then scrub and rinse thoroughly. Always ensure to rinse all components meticulously to remove any cleaning solution residue before refilling with fresh water. Moreover, always keep the area around the fountain clean and dry. While our cats might sometimes make a mess, it’s our responsibility to promptly clean it up.
Try to keep the area dry and immediately remove any food crumbs, spilled water, or anything that could cause odor or attract pests. Also, this goes without saying, maintain your cats’ personal hygiene. Regularly check for bugs, mites, fleas, and lice, especially if they are allowed outdoors. Oftentimes, they can inadvertently bring home all sorts of bugs that can then transfer to their water source
Here’s a video of how you should clean your cat’s water fountain that might help;
How to Prevent Bugs in a Cat’s Water Fountain?
- Consistent cleaning is the cornerstone of prevention. Don’t just top up the water when it gets low; instead, rinse the fountain thoroughly and refill it with fresh, clean water daily. Also, change the fountain’s filter when and as required by the manufacturer’s instructions, typically every 2-4 weeks.
- Make sure to place the fountain in an optimal environment. A well-aired room with low direct sunlight is ideal, as excessive warmth and humidity can encourage bacterial and algal growth. Also, it’s very important to keep the fountain running almost all day. If the fountain isn’t used for a certain period, stagnant water allows bugs, biofilm, and bacteria to build up more rapidly.
- Change the filter if you haven’t used the fountain for more than three or four days, or if the water appears cloudy or has an odor. Before adding a new one, rinse it properly as instructed in the manual. Most importantly, never leave a damp filter in a fountain you won’t be using for a while, as moist areas are breeding grounds for both bugs and bacteria.
Following all these little steps has worked wonders for me. I haven’t noticed any bugs or bacteria films since then. All this may feel tedious, but it’s all worth it when I see my cat happy and healthy.
Reasons Behind Bugs In A Cat’s Water Fountain
In order to effectively tackle the problem, you need to understand the common reasons behind the presence of bugs and other contaminants. We will tell you about the most common reasons that almost every cat owner, including myself, has faced.
- Larvae Build-up: Insect larvae in your cat’s water fountain are very common. Once larvae mature and become adult insects, this can be problematic for you and your family. Regular and thorough cleaning of the water fountain is key to preventing this.
- Environmental Reasons: Sometimes, bugs appear because of environmental factors. Living in a hot and humid area makes it suitable for bugs and bacteria to breed. Consider frequent pest control services if you live in such areas, and ensure good ventilation around the fountain.
- Contamination from Your Cat’s Body: Besides external factors, your cat could also inadvertently be a source of contamination. Bugs or parasitic worms from your cat’s mouth or body can transfer to the fountain water while they drink. Kittens sometimes pick up worms from their mother’s milk that can then travel to the fountains. Therefore, regular veterinary check-ups and deworming, if necessary, are crucial to prevent this type of contamination.
Are Cat Water Fountains Better Than Bowls?
Water fountains are often considered better than traditional bowls if you choose the right one with good quality and maintain it properly. They are typically made of non-porous materials that discourage bacteria buildup. Also, the replaceable charcoal filters effectively remove food crumbs, cat hair, dust, and dirt particles very easily.
Bugs can easily build up in bowls too, especially if water is left stagnant. Since water fountains, with their circulating water and filtration, have a better ability to stay clean, you will notice significantly fewer bugs and contaminants in them compared to bowls. Furthermore, cats are often fascinated by the movement of water fountains. They tend to find running water fresher and more appealing than stagnant water in a bowl, and thus are more likely to drink adequately from water fountains, which promotes hydration.
FAQ
Q. What is the white stuff in my cat water fountain?
This could be a layer of non-biting larvae, biofilm from bacteria build-up, or even mineral deposits. Either way, you should clean it immediately and thoroughly to ensure your cat’s water is safe.
Q. How often should I clean my cat’s water fountain to prevent bugs and other contaminants?
To prevent bugs, biofilm, and other contaminants from growing in your cat’s water fountain, it is recommended to clean it at least once a week, dismantling and scrubbing all parts. The water itself should be changed daily. However, if you notice any slime, debris buildup, or unusual odors, clean it more frequently.
Q. Do vets recommend a cat water fountain?
Yes, many veterinarians recommend cat water fountains as they can be very beneficial for cats. This is because the flowing water encourages cats to drink more, promoting better hydration and potentially reducing the risk of urinary tract issues and other health problems associated with dehydration.

Conclusion
To sum up, are little bugs in cat water fountains harmful? Absolutely, they can impact your cat’s health in numerous ways, from simple lethargy to severe gastrointestinal infections. I didn’t take this lightly when I noticed the bugs, and neither should you.
Water fountains can be a great addition for your cats as long as you’re cautious and diligent about their maintenance. So, keep the water fountain in a clean, dry area with low sunlight. Act promptly to get rid of any bugs or contaminants as soon as you can, so that your cat continues to be in awe of their clean and safe water fountain.
Good luck!