May 8

Sarah Robertson

How to Choose the Right Yellow Guppy for Your Aquarium

Guppies are one of the most popular fish for home aquariums. They are relatively easy to care for and can add a splash of color to your tank. Guppies are available in different colors and shapes, and one of the most popular ones is the yellow guppy.

The yellow guppy, or German yellow guppy, is a member of the genus Poecilia reticulata. Though the natural bright yellow color is unusual to find in freshwater aquatic creatures, guppies are the sole fish with that hue. After years and years of rigorous selection, guppies have been developed. To preserve their color, black melanin must be reduced, which makes most medium-sized guppies seem to have the ideal hue of golden yellow.

A Quick Yellow Guppy Fish Care Guide

  • Scientific Name: Poecilia Reticulata
  • Common Name: Yellow Guppy/ German Yellow Guppy
  • Diet: Omnivores
  • Care Level: Easy
  • Compatibility: Peaceful
  • Ph: 6.0 to 8.0
  • Temperature: 72 – 80 degrees Fahrenheit
  • Water hardness: 8-12 dGH
  • Minimum Tank Size: 5 gallons for a group
  • Tankmates: Mollies, Platies, Swordtails, Endler's livebearers, Girardinus species, Heter
  • Breeding: Livebearers
  • Gestation period: 26-31 days
  • Size: 2.5 inches
  • Life expectancy: 2 years

Yellow Guppy Care

Yellow guppies are a beautiful and low-maintenance fish to add to your aquarium. Yellow guppies are peaceful fish that thrive in mixed aquaria with other calm species. They're recognized for their stunning hues and long fins, but they're also quite easy to care for and require only minimal maintenance. However, you should be aware of some Yellow guppy care guidelines in order to guarantee that your fish are comfortable and healthy.

One of the most important things to remember when caring for Yellow guppies is water quality. As these fish originate from tropical areas including Asia, Central America, and Brazil where they live in slow-moving waters like ponds or swampy streams, it's crucial that their aquarium resembles their homeland as much as possible to create the best environment for them.

For example, a tank with a sandy bottom and lots of plants for the fish to hide among is essential. These fish are sensitive, therefore it's critical to have clean water with low ammonia levels. To preserve a good environment for your fish, test the tank on a regular basis and perform minor water changes as needed. Furthermore, overfeeding may produce unclean surroundings, so be cautious not to end up doing this.

Not only is it vital to know what food to feed your Yellow Guppy, but also how much protein their diet requires. These fish are typically omnivores who eat live, frozen, or flake seafood; however, when kept in captivity, a variety of commercially available foods will suffice. It's necessary that they have a balanced diet with the right amount of nutrients and key proteins.

If you want to know more about yellow guppy fish care, read on.

Yellow Guppy Size

Yellow guppies usually grow to be about 2.5 inches long, but with the right diet and living conditions, they can reach up to 3 inches in length. If you want your guppies to be as healthy and large as possible, make sure their food quality is high and that they have a clean water source. Smaller-than-average guppies are often the result of poor nutrition or inbreeding, so pay attention to your guppy's size and take action if necessary.

Yellow Guppy Lifespan

If you want your yellow guppy to enjoy a long life, make sure its living quarters are clean and that they have enough food. Additionally, try to recreate as natural of an environment for them as possible to keep them stress-free. The quality of the water in their tank also plays a role in how long they live.

Yellow Guppy Appearance

The yellow guppy fish is a beautiful freshwater fish that is popular among aquarium enthusiasts. These fish are known for their pretty yellow coloration and long fins.

Though the natural bright yellow color is rare to be found in freshwater aquatic species, guppies are the only fish with that color. Yellow guppies have been developed after years and years of careful and selective breeding. The black melanin needs to be reduced in order to maintain the color, and most medium-sized guppies are seen to have the perfect yellow color.

Like any other guppy, the yellow guppy has a torpedo-shaped body. They have a single dorsal fin and an anal fin that is split into two parts. The fins are what give this fish extra beauty, and they can be of different colors and shapes.

There are many types of yellow guppies including Yellow Tuxedo Guppy, Yellow Cobra Guppy and Micariff yellow guppy.

Gender Diferentiation

  • The most simple method to tell the sexes apart is by looking at their tails. The male's tail is narrower than the female's, and its fins are considerably longer.
  • Females have a dark area on their vent called a gravid spot, which becomes dim when the female is carrying eggs.
  • Males have brightly colored and patterned bodies that help them find mates, while females are drabber in color.
  • On average, the female guppies can grow up to 2.5 inches in length, while the males only grow to be about 2 inches long.

Yellow Guppy Behavior 

Yellow guppies are lively fish that love to swim in their aquarium. They aren't known to be aggressive towards other fish and prefer to live in groups, therefore enclosures with at least 5 other fish are suggested. If you have male and female Yellow guppies, they will most likely get along well.

Guppies are known to be friendly fish, and they don't tend to bother other tank mates. However, because they are so small, larger fish may see them as food. Avoid putting yellow guppies with larger fish that may eat them. Do your research to find out which fish are compatible with guppies.

Because yellow guppies are known to be excellent leapers, it's vital to keep a tight-fitting lid on your tank. If the lid is not secure, they will escape and may die.

yellow guppy

How to Choose the Right Yellow Guppy for Your Aquarium

Now that you know all about yellow guppies, it's time to choose the right one for your aquarium. Here are a few things to keep in mind when making your selection:

  • Choose a healthy fish. Avoid fish that have cloudy eyes, clamped fins, or fin rot.
  • Look for a yellow guppy with bright colors.
  • If you want a specific type of yellow guppy, do your research to make sure the fish you're buying is the type you want.
  • Ask the breeder or seller how the fish have been raised. Fish that have been well-cared for are more likely to be healthy and hardy.
  • Avoid purchasing fish from a pet store that gets their fish from mass breeding facilities. These fish are more likely to be in poor health and have genetic defects.
  • Quarantine new fish before adding them to your aquarium. This will help prevent the spread of disease to your other fish.

Note: When it comes to yellow guppies, there is no one-size-fits-all answer. It's important to do your research and choose the fish that is right for you and your aquarium. With a little time and effort, you'll be able to find the perfect yellow guppy for your home.

Yellow Guppy Tank Setup

Yellow guppies are not picky eaters and can thrive in a variety of water conditions, yet they require a clean tank to remain healthy - just like other fish. As a novice fishkeeper, it's best to start with a smaller aquarium and work your way up.

Here are some suggestions for setting up a Yellow guppy tank:

Tank Size

For yellow guppies, you will need at least 5 gallons. In order to keep more fish, you will need a larger tank with more space for the fish to swim and fewer water quality problems. If you want to keep other species with them, you might need an even bigger tank.

Water Conditions 

Although the yellow guppy can live in a wide range of environments, keeping them at an appropriate level is critical for them to reach their full potential. The temperature at which yellow guppies thrive is between 72-80 degrees Fahrenheit. If possible, try to avoid sudden temperature changes since they are bad for fish.

To provide the optimum environment for your Full Yellow Guppies, keep a water salinity of 6.0 to 8.0 and a hardness of KH 8-12.

All three of these parameters, as well as Ammonia, Nitrites, and Nitrates, should all be at 0ppm. Any of these levels getting higher can harm or even kill your fish. To keep all three at 0 ppm, perform a 30-50% water change every week and vacuum the gravel to remove debris that can rot and release these poisons.


Your filter should be able to turn over the entire volume of your aquarium at least three times each hour. A canister or hang-on back filter is ideal for this.

For a 5-gallon tank, a filter that can turn over 30-60 gallons per hour is required. If you have a larger aquarium, you'll need a filter that turns over the entire volume of your tank at least 3 times each hour.


While yellow guppies don't need special decorations, if you want to make your aquarium more attractive, there are several alternatives. Here are some ideas:


Yellow guppies do not require live plants, but they appreciate them. Plants assist in the maintenance of clean water and provide hiding places for fish. Live plants also increase the amount of oxygen in the water. The following are some excellent live plant options for Yellow guppy tanks:

  • Java moss
  • Hornwort
  • Anacharis
  • Water sprite
  • Ludwigia

If you're having trouble finding these plants in your region, don't worry; artificial plants are a wonderful option. Before adding them to the tank, make sure they're made of non-toxic materials and have been cleaned appropriately.

Rocks and Driftwood

Adding driftwood and stones to your aquarium not only benefits the well-being of your fishes by providing them with hiding places but also gives your aquarium a more natural look.

Make sure the pieces you pick are suitable for aquariums and will not release toxins into the water. Clean it thoroughly ahead of time.

It's also critical to double-check that the decorations you choose aren't sharp or jagged, since they might cut your fish's fins.

Some of the best rocks and driftwood for your guppy tank include:

  • Malaysian driftwood
  • Bogwood
  • Limestone


Although yellow guppies don't need a special type of substrate, you will need some sort of foundation to keep the plants in place if you planning on using them. You can use a variety of substrates such as:

  • Gravel
  • Sand
  • Crushed coral
  • Pebbles

Make sure the substrate you choose is non-toxic and won't release harmful chemicals into the water. Also, remember to clean them before adding them to the tank. You can do this by boiling them or soaking them in a 10% bleach solution.


Yellow guppies don't need special lighting, but if you want to showcase your fish and plants, then getting the right light is essential. The following are some of the best options for aquarium lighting:

  • Fluorescent bulbs
  • LED lights
  • Metal halide bulbs
  • High-intensity discharge bulbs

In case you're wondering, you don't need a special light for live plants; any of the above options will work just fine.

When choosing a light, make sure it's the right size for your aquarium and that it doesn't produce too much heat. Also, remember to get a timer so that the light is only on for 8-10 hours a day.

yellow guppy

Yellow Guppy Tank Mates 

The Yellow guppy is a passive fish that can be kept with other species of fish. Tankmates for the Yellow guppy include:

  • Neon tetras
  • Guppies
  • Platies
  • Swordtails
  • Mollies
  • Danios
  • Barbs
  • Corydoras catfish

While Yellow guppies are generally peaceful fish, there are some species of fish that should not be kept with them. Aggressive or nippy fish will stress the Yellow guppies and may even kill them. In addition, avoid mixing yellow guppies with the following tankmates:

  • Betta fish
  • Goldfish
  • Sharks
  • Cichlids

Tank Maintenance

The following is a list of essential tank maintenance tips to keep your yellow guppy healthy and happy.

  • Regular water changes are important. Remove at least 10% of the water from your tank once a week and replace it with fresh, treated water to keep the water clean and free of pollutants.
  • Every other week, vacuum the gravel in your tank to remove any debris that has built up. This will also aid in maintaining high water quality.
  • Be sure to regularly clean your filter to help remove any toxins or waste that has accumulated in the filter media.
  • Keep your plants trimmed. From time to time, you may need to trim back the plants in your tank. This will help maintain their health and prevent them from consuming the entire space.

When performing tank maintenance, follow these guidelines:

  • Never remove all of the water from your tank. This will cause your fish to go into shock and may even kill them.
  • Be sure to use a gravel vacuum that is designed for aquariums. These vacuums are gentle and won't damage your fish or plants.
  • When cleaning your filter, be sure to rinse the filter media in old tank water. This will help to remove any toxins that may be present in the water.
  • When trimming your plants, be sure to use sharp scissors. This will help to prevent damage to the plant.
  • While changing the water, use a water conditioner to remove any toxins that may be present in the tap water.

Yellow Guppy Diet

Yellow guppies are omnivores that eat a variety of fish diets. flakes, pellets, frozen food, and live fish are all suitable.

Here are some good food choices for Yellow guppies:

  • Flakes or pellets: A yellow guppy's diet should consist of high-quality flakes or pellets as they are easy to digest and contain all the nutrients a guppy needs. Be wary of foods with lots of fillers or artificial colors as these can harm your fish.
  • Live food: By adding live food to your Yellow guppy's diet, you are increasing the nutrient value they are receiving. Live food often contains more nutrients than pellets or flakes and can help keep your fish healthy overall. Some good examples of live foods include brine shrimp, daphnia, blackworms, etc.
  • Frozen food: Live food is more expensive to maintain, and frozen food is a viable substitute. It's more convenient and simpler to store than live food. Before feeding your fish, ensure that the meal has been thawed out properly.
  • Vegetables: Yellow guppies also enjoy vegetables. Blanched spinach, zucchini, and peas are all good options. To ensure that uneaten crops do not decay and pollute the water, remove any remaining veggies from the tank.

What Not To Feed

There are some things that you should not feed your Yellow guppy as they can be harmful or even fatal. Some of these include:

  • Junk food: Human junk food, such as chips or candy, is not good for fish and should be avoided.
  • Raw meat: Raw meat can contain bacteria that can be harmful to your fish. It's best to avoid feeding them raw meat altogether. This does not include live food, which is safe for them to eat once in a while.
  • Expiyellow food: Never feed your fish expired food as it can be poisonous. Always check the expiration date before feeding your guppies.

Feeding Tips

Here are a few tips to help you with feeding your Yellow guppies:

  • Feed them twice a day: It's best to feed your guppies twice daily, once in the morning and once at night. This will help to ensure that they are getting enough food and nutrients.
  • Don't overfeed them: Overfeeding your fish can cause problems such as bloating and swim bladder disease. Only give them as much food as they can eat in a few minutes.
  • Have a varied diet: A varied diet is important for your fish to stay healthy. Be sure to offer them different types of food so that they are getting all the nutrients they need.
  • Remove any uneaten food: Any uneaten food should be removed from the tank as it can decay and pollute the water.
yellow guppy

Yellow Guppy Diseases

Although yellow guppies are tough, there are some diseases from which they cannot escape.

These include:

Ich: The fish's skin begins to develop tiny white spots, which is known as ich. It's caused by an ectoparasite (ciliate protozoan Ichthyophthirius multifiliis), making it extremely simple to detect. The fish begin rubbing their skin against rocks, plant leaves, or other objects in the aquarium.

They can also lose interest in food. You'll notice little white dots on the fish's skin and fins. To cure ich, you'll need to raise the water temperature and perform a partial water change. Check the temperature of the water on a daily basis to ensure that it does not exceed 80 degrees Fahrenheit. Follow the manufacturer's instructions for adding medication.

Add aquarium salt, according to the manufacturer's recommendations, at a rate of 1 teaspoon per gallon. Allow 4-7 days for this phase to run its course before checking on it again. Gradually return the water temperature back to normal over a period of several days or weeks. Once the ich has been eliminated, it's important to take measures to prevent it from happening again.

This includes quarantining new fish before adding them to the tank and keeping the aquarium clean.

Velvet: The most common form of anemone blenny disease is velvet disease. It's also known as ich, but it's considerably less common to find in aquariums kept by amateurs. A fish with velvet might have tiny golden-color dots all over its body, making it appear like grains of dust. If you don't take precautions, this condition may quickly spread to every one of your other fish.

Fish keepers often discover problems with a fish's skin too late because the early stages are difficult to detect. A fish's skin is velvet and small dots make it hard to see changes. When the skin starts peeling and there is blood, then owners know something is wrong. Velvets can be treated with copper medication.

To most effectively treat your aquarium, turn off the lights until the disease is gone. Once your fish are symptom-free, perform 70-90 percent water changes every other day for at least two weeks.

Fin Rot: Guppies that have rotting fins and tails suffer from a bacterial infection, which causes their fins and tail to appear welded together. This can also be caused by a fungus that develops on nipped fins. In addition, poor water quality and ammonia burns are two additional factors that cause decaying tails.

It is crucial to identify the cause of rotting fins because treatment for bacterial infection or fungus differs. If there is no damage to the fins and tail but they have started rotting, bacteria are most likely the culprit. If your fish has fin rot, you should isolate it and give it antibiotics.

However, if the cause of the fin tail rot is a fungus, then treat it with special medication – always following instructions on said packaging. In order to avoid "ammonia burns", be sure to provide high-quality water for your fish.

Protozoan: Guppies are the most common hosts for the protozoan parasite, which can infect them. Although other fish may become sick as well, guppies are by far the most prevalent host for this little creature. The parasite latches onto the fish's skin and works its way into the fish's body via its muscles until it reaches circulation.

water quality is bad, this worm generally develops in shoddy tanks. If your fish has protozoan, heat the water in their tank to keep the temperature stable. This can be treated with Malachite Green or Formalin at early stages, and copper medications like Seachem Cupramine should be used for more severe cases. After treatment, change 50-70% of the water.

Water quality is important for the prevention of all these diseases. Add an ammonia remover to your guppy tank and change 20-30% of the water every week. This will help to keep the levels of ammonia and nitrites low, which will create a healthier environment for your fish.

Columnaris: This infection, which appears to be fungal but is actually caused by bacteria, typically grows as a large white sludge on the fish's mouth or midsection. The colony of bacteria slowly paralyzes their muscle and patients have difficulty swimming and lose their appetite. 

Guppies are highly susceptible to the disease and can become infected if they come into direct contact with an affected guppy. The illness is highly transmissible and affects female guppies, although male guppies can also be ill. If the infection isn't treated, it has the potential to eradicate the tank's entire fish population.

The best way to fight Columnaris and mouth fungus is to immediately begin the treatment process once any symptoms become apparent. Two popular drugs used for this purpose are Maracyn and Formalin. In addition, increasing the salt content in your aquarium can also be helpful: do a 50% water change and add one teaspoon of salt per gallon every day for three days after the initial water change.

Only remove the salt from your fish tank once it has completely healed. In addition, a 30-minute potassium permanganate (KMnO4) bath can cure Columnaris; however, use this treatment with caution. Potassium permanganate is a powerful oxidizing agent and exceeding 10mg/l in the bath risks burning your fish.


There are many different symptoms associated with different guppy diseases, which can make it difficult to identify the root cause of the problem. However, there are some general signs that your fish is unwell, such as:

  • lethargy
  • loss of appetite
  • unusual behavior
  • cloudy eyes
  • white spots on fins or body
  • fraying or rotting fins
  • redness or inflammation
  • bulging eyes
  • unexplained weight loss

If you notice any of these symptoms in your fish, it's important to take action immediately and consult a veterinarian if necessary.


The following are some tips that will help you prevent your guppy from getting sick:

  • Keep the water in their tank clean and free of ammonia and nitrates.
  • Do a partial water change every week and clean the gravel at the bottom of their tank.
  • Don't overfeed your fish – only give them as much food as they can eat in a few minutes.
  • Don't put fish of different sizes together in the same tank.
  • Avoid putting stressors in their environments, such as bright lights or loud noises.
  • Keep their tank at a stable temperature between 72-82 degrees Fahrenheit.


Depending on the specific disease, there are a variety of different treatment options available. However, it's important to consult a professional before taking any action, as some diseases can be difficult to treat and may require medication. Generally speaking, the earlier you catch a disease, the easier it will be to treat.

Some common treatment methods include:

  • increasing water quality
  • adding salt to the tank
  • using antibiotics or other medications
  • quarantining affected fish
  • performing regular water changes

Yellow Guppy Breeding

It's critical to realize that guppies breed fast and can quickly fill a tank if they are not kept in check. Guppies are livebearers, which means they give birth to living young instead of laying eggs.

These steps will show you how to breed guppies:

  • Choose a guppy pair to breed. The male should have large, colorful fins, and the female should be plump with a gravid spot. It's preferable to choose a young pair of guppies because they're more likely to produce healthy offspring. It is beneficial to choose three or four adolescent pairs to increase the possibility of reproduction.
  • Setting up a breeding tank is easy and only requires a few materials. First, you'll need a 10-gallon tank or larger. The female guppy will also need plenty of hiding places; you can use live or plastic plants for this purpose. In addition, be sure to have a fine-mesh net on hand to catch the fry (baby fish) when they're born. Finally, set the temperature of the breeding tank between 75-80 degrees Fahrenheit prior to adding any fish.
  • After the breeding tank is prepared, place the guppies inside and let them acclimate to their new surroundings for an hour before giving them free rein in the tank.
  • After the female guppy gives birth, wait for the fry to be born. She will give birth to anywhere from 20-60 fry at a time. They are very small and vulnerable, so have a net ready to catch them as soon as they're born. Once all of the fry are out, remove them from the breeding tank and place them in their own tank.
  • Feed the fry. The fry will need to be fed several times a day, and it is recommended that you do so for at least four hours. You may feed them with live baby brine shrimp or specialized fry food. You can start feeding them adult guppy food when the fish are about two weeks old
  • Keep an eye on the fry tank. To avoid sickness, keep the fry tank clean. Every week, replace the water in the tank and remove any uneaten feedings. Once your trout is four weeks old, it may be transplanted to a larger aquarium.

Frequent Questions

What is yellow guppy?

The yellow guppy is a small freshwater fish that is popular in aquariums. It is a member of the Poeciliidae family and is native to South America. They have bright yellow coloration and are known for their long fins.

Can female guppies be yellow?

Yes, female guppies can be yellow. The coloration of guppies is determined by their genes, and females can inherit the yellow gene from their parents.

How long do yellow guppies live? 

Yellow guppies typically live for two to three years. However, some yellow guppies have been known to live up to five years with proper care.

How many yellow guppies should be kept together?

It is recommended that you keep at least four yellow guppies together. This will allow them to form a social hierarchy and will help reduce aggression between them.

Do yellow guppies need a filter? 

Yes, yellow guppies need a filter. A filter will help to keep the water clean and provide a place for the fish to hide.

Do yellow guppies need a heater?

No, yellow guppies do not need a heater. They are tropical fish and prefer water that is between 75-80 degrees Fahrenheit. However, if you live in a cold climate, you may need to use a heater to maintain the water temperature.

Summing Up

Yellow guppies are lovely fish that succeed in any aquarium. They're easy to care for and breed quickly, making them ideal for both novice and experienced aquarists. Guppies are low-maintenance fish that coexist well with other tank mates.

They get along swimmingly with a wide array of fish, such as mollies, swordtails, platies, and tetras. Guppies enjoy swimming and exploring, therefore a tank with at least 5 gallons is required. If you want to use live plants in your tank, guppies are an excellent choice since they will not consume them.

Yellow guppy will brighten up your aquarium with their vibrant yellow color scheme. They are not picky eaters and will consume both plants and animals. In their natural habitat, they subsist on algae, small insects, and crustaceans. However, in a domesticated setting like an aquarium, you have more options for what you can feed them.

Live baby brine shrimp flakes, pellets, or freeze-dried foods are all viable alternatives. To guarantee they obtain all of the nutrients they require, provide them with a varied diet. So, what's stopping you? Get yourself some Yellow guppies and put them in your aquarium to watch them swim and play.

Sarah Robertson

I am a passionate blogger who also happens to be a fish keeping enthusiast. Writing about my hobby is something that I absolutely love to do, and it's no secret that my chosen topic is always centered around fish keeping.

Sarah Robertson

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