Peacock Gudgeon: Tank Setup, Diet, Tank Mates, Diseases & More!

Have you ever heard of the Peacock Gudgeon, a small but stunning freshwater fish that can add a splash of color to your aquarium?

Well, I recently set up a tank for some of these beauties and let me tell you, they have quickly become my favorites. With captivating colors and a peaceful demeanor, these fish make a great addition to any community aquarium.

Peacock Gudgeons require a tank size of at least 20 gallons, with a temperature range of 72-82°F and a pH range of 6.5-7.5. They are omnivores and need a varied diet of high-quality pellets or flakes, as well as occasional live or frozen foods. They also require a well-planted aquarium with plenty of hiding places. Regular water changes and tank maintenance are important for their health.

When it came to setting up their tank, I made sure to provide an environment simulating their natural habitat.

Providing a mix of hiding spots and open areas, such as caves, rocks, and plants, ensures that these fish feel safe and secure.

Additionally, maintaining a stable water temperature and pH is vital for their health, just like any other species.

Feeding my Peacock Gudgeons has been quite a fascinating experience. They’re not picky eaters, readily accepting a variety of high-quality flake and pellet foods.

However, I have noticed that they particularly enjoy live or frozen brine shrimp and bloodworms, which help bring out the vibrant colors in their iridescent scales.

Peacock Gudgeon fish

Species Summary


The Peacock Gudgeon, also known as the Peacock Goby, is an interesting and colorful fish from Papua New Guinea. The first time I came across them, I was instantly drawn to their vibrant colors and unique markings.


With proper care, this small freshwater fish can live up to 5 years. I’ve found that maintaining good water quality plays a key role in their longevity.


The Peacock Gudgeon’s iridescent scales and eye-catching red, blue, and yellow markings create a beautiful, eye-catching appearance. One of my favorite features is the striking, almost fluorescent blue stripes that run the length of the fish.


They remain relatively small, reaching only 2-3 inches in length. This compact size makes them suitable for smaller tanks, something I appreciate as a space-conscious hobbyist.

Growth Rate

Peacock Gudgeons typically grow at a moderate rate. Mine reached their full size within 8-12 months from the time they were juveniles.

Behavior & Temperament

In my experience, these fish are peaceful and shy, occasionally hiding amongst plants and decorations. Watching them interact with tank mates in a non-threatening manner has always been enjoyable for me.

Male Vs. Female

Males tend to have brighter colors, larger fins, and a more pronounced hump on their forehead compared to females. I’ve noticed that during breeding, males are more aggressive towards rival males, while females are usually more reserved.

Tank Setup

Tank Size

When I first set up a tank for my Peacock Gudgeon, I chose a tank with a minimum size of 15 gallons. This is because they are a small species that grow up to 3 inches, and a larger tank provides them space to swim around comfortably.


For lighting, I found that a moderate level of light (not too bright or dim) suits the Peacock Gudgeon best. Personally, I use an adjustable LED light so I can easily adapt to their needs.

Filtration & Aeration

I used a sponge filter with gentle water flow to create proper filtration and aeration in my tank. This system prevents strong currents that Peacock Gudgeons dislike and keeps the tank oxygenated.


Being a tropical fish, I installed an adjustable submersible heater to maintain tank temperatures between 72°F and 79°F. Proper temperature helps keep my fish healthy and comfortable.


I opted for a dark, fine-grained sandy substrate for the Peacock Gudgeon tank. This makes them feel at home and enhances their striking colors.


In my tank, I include driftwood, caves, and hiding spots for my Peacock Gudgeon. These decorations create a natural-looking habitat that allows them to feel secure and exhibit their natural behaviors.


Finally, I added live plants like Java Fern and Anubias to provide additional cover and contribute to a healthier tank environment. These plants improve water quality and add to the tank’s aesthetics.

Water Quality

Water Temperature

In my experience, the optimal water temperature for Peacock Gudgeons lies between 74-78 °F (23-25 °C). Having a reliable heater is key for keeping these temperatures stable, as fluctuations can cause stress to the fish.

Water pH

I’ve found that Peacock Gudgeons do well in slightly acidic to neutral environments. The recommended pH range for their water is 6.5-7.5. I frequently check the pH levels to ensure their comfort.

Water Hardness

Peacock Gudgeons can tolerate a range of water hardness; however, they generally prefer softer water. When I set up my tank, I aim for a water hardness of 5-12 dGH. Regular water testing can help maintain this range.

Water Changes

To maintain proper water quality, I perform regular water changes. I find that changing 20-30% of the water every two weeks helps my Peacock Gudgeons stay healthy, as it removes waste and replenishes essential minerals. Consider the following water change schedule:

  • 20-30%: Perform every 2 weeks
  • Test water parameters: Once a month or so

Consistent attention to these water quality requirements has helped my Peacock Gudgeons thrive in their tank environment.

Tank Maintenance

When I first set up my Peacock Gudgeon tank, I made sure to create a favorable environment for these colorful fish. Weekly water changes of 25% to 30% are essential to keep the water clean and maintain the right balance of nutrients. I’ve found that using a gravel vacuum helps immensely in cleaning the substrate and removing debris.

Peacock Gudgeons prefer water with a pH level between 6.0 and 7.5, and temperatures ranging from 72°F to 78°F. To achieve this, I use both a heater and a thermometer in my tank, regularly checking and adjusting the temperature as needed. Additionally, I carefully monitor the ammonia, nitrites, and nitrates using a water test kit to ensure their levels remain within the safe range for my fish.

Plants, decorations, and hiding spots are essential parts of the tank setup. I noticed that my Peacock Gudgeons love swimming around plants like Java moss, Anubias, and Java fern, which also help improve water quality. To keep them healthy, I trim any dying leaves and replace or replant when necessary.

I once had an issue with algae growing in my tank, but I was able to control it by regulating the amount of light my tank received and adding a few algae-eating tank mates. Nowadays, I limit the aquarium lighting to 8-10 hours a day, using a timer to ensure consistency.

Remember, proper tank maintenance not only keeps your Peacock Gudgeons healthy and happy but also prevents potential issues like diseases and stress. Regularly monitoring and maintaining your tank will ensure a thriving environment for these beautiful fish.

Tank Mates

Compatible Fish Species

When I set up my own Peacock Gudgeon tank, I found that they do well with peaceful, similarly-sized tank mates. Some ideal companions are:

  • Tetras: I had great success with Neon and Cardinal Tetras sharing the tank with my Peacock Gudgeons.
  • Corydoras: These friendly bottom-dwellers pose no threat, and I’ve observed them coexisting happily.
  • Dwarf Gouramis: Just like me, many aquarists have found Dwarf Gouramis compatible due to their gentle disposition.

Incompatible Fish Species

On the other hand, there are certain fish species that can cause stress or harm to your Peacock Gudgeon. I would recommend avoiding:

  1. Aggressive Fish: Species like Cichlids and Oscars definitely didn’t work out in my tank – they made my Peacock Gudgeons quite stressed.
  2. Fin-nippers: In my experience, Serpae Tetras and Tiger Barbs tend to harass Peacock Gudgeons by nipping at their fins.
  3. Large Predatory Fish: Remember the time I added an Angelfish to the tank? It ended badly! Larger fish view smaller ones as food, so keep them separate.

Selecting appropriate tank mates is crucial in maintaining a peaceful environment for your Peacock Gudgeons.


What To Feed

As a peacock gudgeon owner, I can tell you that their diet consists of a variety of foods. They need a well-balanced diet that includes live, frozen, and high-quality pellet foods. Some of their favorites include:

  • Live foods: Brine shrimp, daphnia, and mosquito larvae
  • Frozen foods: Bloodworms, mysis shrimp, and brine shrimp
  • Pellets: High-quality sinking pellets, especially those designed for smaller fish


In my experience, feeding peacock gudgeons twice a day is ideal. Just make sure not to overfeed them! I usually provide only as much food as they can consume within a minute or two. This frequency allows them to maintain their vibrant colors and energy levels without becoming overweight.


Here are a few tips I’ve learned to ensure a healthy diet for my peacock gudgeons:

  1. Variety: Offer different types of foods to ensure they receive all the necessary nutrients.
  2. Soak Pellets: Soak the pellets for a few minutes to soften them before feeding, making it easier for the fish to consume.
  3. Observe: Watch your fish during feeding to ensure all of them are eating and not being outcompeted by tank mates.

By following these recommendations, you should be able to provide your peacock gudgeons with a healthy and nutritious diet.

Common Diseases


As a Peacock Gudgeon owner, I’ve witnessed a few common diseases that can affect these fish. The most prevalent ones are Ich, fin rot, and bacterial infections.


Ich, also known as white spot disease, presents as small white spots all over the fish’s body. When my Peacock Gudgeon was affected by fin rot, their fins appeared ragged and frayed. Lastly, for bacterial infections, symptoms were more general, like cloudy eyes, lethargic behavior, or loss of appetite.


When my fish had Ich, I increased the tank’s temperature gradually to around 86°F, which helped kill the parasites. For fin rot, I treated the tank with a quality commercial medication specifically designed for fin rot and made sure to follow the instructions carefully. Bacterial infections required antibiotic treatments to ensure recovery.


To minimize the risk of diseases, I took these preventative measures:

  • Maintaining stable water conditions by checking the pH, ammonia, nitrite, and nitrate levels
  • Conducting regular water changes
  • Providing a nutritious diet with varied ingredients
  • Avoiding overcrowding in the tank
  • Implementing proper quarantine procedures for new fish and plants

These practices have been effective in maintaining a healthy environment for my Peacock Gudgeon.

Signs Of A Healthy Peacock Gudgeon

When I first got my Peacock Gudgeon, I was keen on keeping an eye out for signs of good health. Here’s what I look for daily:

  1. Vibrant colors: A healthy Peacock Gudgeon will have bright and vivid colors, as their name suggests. Their eye-catching appearance is part of their charm!
  2. Active behavior: It’s essential for them to be swimming actively around the tank, as it indicates they’re comfortable and at ease in their environment.
  3. Good appetite: Ensuring they have a hearty appetite is crucial. I always make sure my Peacock Gudgeon is eating well and the varied diet I provide.
  4. Clear eyes: Just like with many other fish species, the eyes can be a window to their health. Having clear, bright eyes is a positive sign for a Peacock Gudgeon.
  5. No visible signs of disease: Check for any physical abnormalities like white spots, fin rot, or a swollen abdomen, as these can all point to unhealthy conditions. My Peacock Gudgeon has remained free of such issues, so I know I’m doing something right!
  6. Peaceful interaction: Lastly, they should socialize with tank mates without signs of aggression or constant hiding. My Peacock Gudgeon seems to get along well with its tank mates, indicating its overall well-being.

Remember that maintaining a healthy tank environment, providing a balanced diet, and carefully choosing compatible tank mates are key factors in keeping your Peacock Gudgeon healthy and thriving. In my experience, following these guidelines ensures that my fish remains happy and full of life!

Signs Your Peacock Gudgeon Is Sick

When I first set up my Peacock Gudgeon tank, I was always on the lookout for signs of illness. It’s important to catch any issues early, so here are some key indicators to watch for:

  • Loss of color: Peacock Gudgeons have vibrant colors, but when they’re sick, they tend to lose their vivid hues. Keep an eye on their coloring to ensure it remains consistent.
  • Swimming behavior: If your Peacock Gudgeon is swimming erratically or has difficulty staying upright, this may signal a health problem.

I once noticed one of my Peacock Gudgeons swimming upside down, and after investigating the issue further, I discovered it had swim bladder disease.

  • Changes in appetite: A sick Peacock Gudgeon may show a loss of appetite or sudden increase in appetite. Monitor their feeding habits closely.
  • Physical abnormalities: Check for any visible signs of illness such as bloating, growths, or white spots on their body.

In my experience, Peacock Gudgeons are generally a robust fish species, but unfortunately, I have had a few cases of ich in my tank.

  • Stress: Stressed fish are more prone to illness, so it’s essential to maintain a healthy and stable environment for your Peacock Gudgeon.

By observing these signs and taking prompt action, you’ll help ensure the health and well-being of your Peacock Gudgeon.


Peacock Gudgeon fish 2

Breeding Setup

When I set up my breeding tank for Peacock Gudgeon, I ensure the tank is at least 15 gallons – this provides enough space for the breeding pair and their fry. I’ve found it helpful to keep the water temperature between 75-79°F and maintain a pH of around 7.0-7.5. Adding some smooth rocks, caves, or PVC pipes is also crucial as these fish prefer laying their eggs in such hiding spots.

How To Breed

To encourage breeding, I usually keep the male and female in a densely planted, well-decorated environment with hiding places. I also maintain a high-quality diet, feeding them live or frozen foods such as bloodworms and brine shrimp, allowing them to display bright colors and improve their chances of successful breeding.

Throughout the courtship process, I’ve observed that males tend to be quite persistent and will display their vibrant colors to attract the females. Once they find a suitable mate, they often guide the females to their chosen spawning site.


After the eggs have been laid and fertilized, I carefully monitor the breeding tank and often find the male guarding the eggs, which incubate for around 5-10 days. As the eggs hatch, managing the care of the fry becomes essential.

I particularly opt for a sponge filter to maintain gentle water flow in the breeding tank and ensure the fry aren’t sucked up into the filter. I also ensure that the fry receive proper nutrition by feeding them freshly hatched brine shrimp or other suitable fry foods at least twice a day.

In the initial stages of growth, I perform regular water changes to keep the environment clean and stable. As they grow, I begin to feed them a more diverse diet, including crushed flakes and other small foods suitable for their size. This approach has worked well for me in raising healthy Peacock Gudgeon fry.

Product recommendations for Peacock Gudgeon:

  1. CaribSea Eco-Complete Planted Aquarium Substrate: This substrate is specifically designed for planted aquariums and can provide a natural-looking environment for your Peacock Gudgeon.
  2. API Aquarium Test Kit: Regular water testing is crucial for maintaining a healthy environment for your Peacock Gudgeon, and this test kit can help you monitor the levels of ammonia, nitrite, and nitrate in your tank.
  3. Hydor Koralia Nano Aquarium Circulation Pump: This compact and efficient pump can help improve water circulation in your aquarium and provide your Peacock Gudgeon with a more natural environment.
  4. Seachem Prime: This water conditioner can help remove harmful chemicals from tap water and make it safe for your Peacock Gudgeon.
  5. Hikari Micro Pellets: These pellets are specially formulated for small tropical fish like Peacock Gudgeon and contain high levels of protein and other essential nutrients for healthy growth and vibrant coloration.
  6. Zoo Med Laboratories AquaSun LED Aquarium Hood: This energy-efficient LED hood can provide ample lighting for your Peacock Gudgeon tank and help promote healthy plant growth.
  7. Fluval Plant and Shrimp Stratum: This substrate is specifically designed for planted aquariums and can provide a natural-looking environment for your Peacock Gudgeon.
  8. Omega One Freeze-Dried Bloodworms: This tasty treat can provide your Peacock Gudgeon with a high-quality source of protein and help promote healthy growth and coloration.
  9. Zoo Med Laboratories Nano 10 Canister Filter: This compact and efficient canister filter can help keep the water clean and clear in your Peacock Gudgeon tank.


In my experience with Peacock Gudgeon, I’ve found them to be beautiful and fascinating fish to keep in a home aquarium. Setting up the tank properly is essential, with a mix of plants, hiding spots, and a stable water temperature around 74-78°F.

When it comes to diet, these fish are not picky eaters and will thrive on a mix of high-quality flakes or pellets, and occasional live or frozen foods. Remember to provide a variety of nutrients and avoid overfeeding.

My Peacock Gudgeon seemed to get along well with other peaceful fish, making them suitable tank mates. Some examples of compatible fish include Corydoras, small Tetras, and Rasboras.

During my time with these fish, I noticed that stress and poor water conditions could lead to common aquarium diseases. But keeping the water clean and conducting regular checks can prevent such issues.

Lastly, I’ve found that getting to know their behavior and watching their vibrant colors change as they age is a captivating experience. It can become quite mesmerizing to watch them interact with their environment.

In short, if you’re looking to add a splash of color and beauty to your aquarium, Peacock Gudgeon could be the perfect choice. Happy fish keeping!


What size tank do Peacock Gudgeons need? I’ve found that a 10-gallon tank is a good starting point for a couple of Peacock Gudgeons. Make sure to provide ample hiding places and plants for them to feel secure.

What should I feed my Peacock Gudgeons? In my experience, Peacock Gudgeons enjoy a varied diet. You can feed them high-quality flakes, frozen foods like bloodworms, and live brine shrimp or daphnia.

Are Peacock Gudgeons aggressive? From my observation, they tend to be peaceful and can be kept with similarly-sized tank mates. However, males can become territorial with each other during breeding.

How can I tell if my Peacock Gudgeon is healthy? Keep an eye out for bright colors, as these indicate good health. If they become pale or lose energy, it could be a sign of illness.

What diseases should I watch for? Peacock Gudgeons can be susceptible to infections like ich and fin rot. I always maintain proper water conditions and handle these issues early to prevent complications.

What’s the ideal water temperature for Peacock Gudgeons? Peacock Gudgeons thrive in water temperatures of 72-79°F. I use a reliable heater to maintain consistent temperatures in my tank.

How often should I clean my Peacock Gudgeon tank? I perform weekly partial water changes of 20-30%, making sure to vacuum the substrate and replace any dirty filter media to keep the tank clean and healthy.

Remember to always quarantine new fish before introducing them to your main tank to avoid spreading any potential diseases. Enjoy your Peacock Gudgeons!

Reference: Wikipedia.


Hi there! My name is Jacob, and I'm the founder of this Pet people blog that talks all about aquarium and fishkeeping. I've been passionate about fish and aquatic life since I was a kid, and I've spent countless hours learning about different species, their habitats, and how to create the perfect environment for them to thrive in.

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