Ultimate Guppies Guide – Top 26 FAQs

Guppies (Poecilia reticulata) are small, colorful freshwater fish native to South America. They are widely known for their vibrant colors, flowing fins, and lively personalities. Guppies have been selectively bred for generations, resulting in various color patterns and tail shapes. Due to their beauty, ease of care, and active nature, guppies have become one of the most popular aquarium fish worldwide.

Guppies are favored by both beginner and experienced aquarists for several reasons. Their small size (typically around 1.5 to 2.5 inches) makes them suitable for various tank sizes, including small setups. They are also known for their prolific breeding habits, which can be an exciting aspect of keeping guppies. Additionally, their peaceful temperament and ability to coexist with various tank mates make them versatile additions to community tanks.

Caring Guidelines

1. Tank Setup: Provide a well-maintained aquarium with a minimum size of 10 gallons for a small group of guppies. Ensure the tank has a tight-fitting lid to prevent escapes, as guppies are known to jump. Incorporate live plants like Java moss or Amazon sword to create hiding spots and mimic their natural habitat.

2. Water Parameters: Maintain a stable and clean environment for guppies. The ideal temperature range is between 72°F and 82°F (22°C to 28°C). The pH should be slightly alkaline to neutral, ranging from 7.0 to 7.8. Regular water testing and partial water changes are crucial for optimal water quality. Use MicroBacter7 to condition the water to be suitable for guppies.

3. Filtration and Aeration: Guppies thrive in well-filtered aquariums with gentle water flow. A sponge or HOB (hang-on-back) filter is suitable for their needs. Additionally, provide adequate aeration through an air pump or a gentle water surface disturbance to ensure oxygen exchange. We share this article on the best fish tank filters and believe you will like it.

4. Diet: Guppies are omnivorous and require a varied diet. Offer high-quality flake or pellet food formulated for tropical fish as their primary diet. Supplement their diet with live or frozen foods such as brine shrimp, daphnia, or bloodworms to provide essential nutrients. Feed them small amounts multiple times a day to prevent over-eating and maintain water quality.

5. Tank Mates: Guppies are generally peaceful and can coexist with various community fish. Good tank mates include peaceful tetras, dwarf gouramis, corydoras catfish, and peaceful livebearers like platies and mollies. Avoid keeping guppies with fin-nipping or aggressive fish that may harm their delicate fins.

6. Breeding: Guppies are livebearers and can breed easily in a well-maintained aquarium. If breeding is desired, separate a male and female in a separate breeding tank or use a breeding net within the main tank. Provide hiding places, such as floating plants or mesh, for the fry to escape the adults. Fry should be fed with powdered or crushed fish food until they are large enough to consume regular-sized flakes.

Other Tips

  • Maintaining stable water parameters is crucial for the health of guppies. Sudden temperature, pH, or water chemistry fluctuations can cause stress and health issues. Use a reliable thermometer and heater to maintain a consistent temperature, especially in cooler climates or during winter months.
  • Perform regular tank maintenance to ensure a clean and healthy environment for your guppies. This includes regular partial water changes to remove toxins and debris, substrate vacuuming to eliminate waste buildup, and filter maintenance to keep the water properly filtered.
  • Daily observation of your guppies is important to detect any signs of disease or stress. Look for changes in behavior, such as lethargy or loss of appetite, as well as physical abnormalities like fin rot or discoloration. Quarantine new fish before introducing them to the main tank to prevent the spread of diseases.
  • A balanced male-to-female ratio is essential to minimize aggression and prevent excessive breeding. Aim for a ratio of 1 male to 2 or 3 females to maintain harmony in the tank.
  • If you plan to breed guppies, create ample hiding places for the fry to seek shelter from adult fish. Floating plants, mesh breeder boxes, or dedicated breeding tanks can serve as safe spaces for the fry to grow without being harassed.
  • Regularly monitor the water quality using test kits to ensure appropriate ammonia, nitrite, nitrate, and pH levels. Make necessary adjustments and perform water changes to maintain optimal conditions for your guppies.
  • Avoid overfeeding guppies as it can lead to water pollution and health issues. Feed them small amounts multiple times a day, and remove any uneaten food after a few minutes to maintain water quality. The Ultra Fresh Royal Guppy Mignon Pelle is a nutritious and suitable food choice for guppies.
  • Guppies are known to be jumpers, so having a tight-fitting lid or cover on the aquarium is important to prevent them from escaping. This will ensure the safety of your fish and minimize the risk of accidents.
  • Consider adding a small amount of aquarium salt (sodium chloride) to the water, as guppies tolerate low salinity levels well. This can provide additional disease resistance and promote healthy gill function. However, it is important to research the specific requirements of the other fish in your tank, as some may not tolerate salt.
  • Provide a varied and stimulating environment for your guppies by adding ornaments, live or artificial plants, and hiding spots. Guppies appreciate having places to explore, hide, and retreat when they need privacy or security. This will enhance their overall well-being and reduce stress.
  • When selecting guppies, choose healthy and active fish with vibrant colors and intact fins. Avoid purchasing fish that show signs of disease or stress, such as lethargy, gasping for air, or visible parasites. Healthy guppies should exhibit lively behavior and have a sleek appearance.
  • If you notice any signs of illness in your guppies, such as loss of appetite, abnormal swimming, or visible abnormalities, promptly quarantine the affected fish. Seek advice from a knowledgeable aquatic veterinarian or experienced aquarist to diagnose the issue and provide appropriate treatment. Early intervention can prevent the spread of diseases and help your guppies recover their health.

Remember that guppies, like any other living beings, require proper care, attention, and a suitable environment to thrive. By providing them with a well-maintained aquarium, balanced diet, compatible tank mates, and regular monitoring, you can enjoy the beauty and vibrancy of these captivating fish while ensuring their health and well-being.


1. What is the best food for guppies?

Guppies are omnivorous fish that require a varied diet. High-quality flake or pellet food specifically formulated for tropical fish serves as a staple. Supplement their diet with live or frozen foods such as brine shrimp, daphnia, or bloodworms to provide essential nutrients and promote optimal health.

2. What is the best pH for guppies?

Guppies prefer a slightly alkaline to neutral pH range of 7.0 to 7.8. Maintaining a stable pH within this range is crucial for their overall well-being and proper physiological function.

3. What is the best substrate for guppies?

A fine-grained substrate like sand or gravel is suitable for guppies. Avoid using sharp or rough substrates that can damage their delicate fins. Live plants can also be added, as they provide natural hiding places and help maintain water quality.

4. What is the best tank for guppies?

A tank size of 10 gallons or larger is recommended for a small group of guppies. Guppies are active swimmers, so they provide ample swimming space. Ensure the tank has a secure lid to prevent them from jumping out.

5. Can angelfish live with guppies?

Angelfish may not be the best tank mates for guppies. While some individuals may coexist peacefully, angelfish have the potential to become aggressive and may nip at the guppies’ fins.

6. Can betta fish live with guppies?

The compatibility of betta fish and guppies depends on the temperament of the individual betta. Some bettas may coexist peacefully with guppies, while others may exhibit aggression. It’s crucial to monitor their interactions closely and be prepared to separate them if necessary.

7. Can guppies live with goldfish?

It is not recommended to house guppies with goldfish. Goldfish prefer cooler water temperatures and have different dietary and environmental requirements than guppies. Additionally, goldfish can grow larger and may unintentionally harm the smaller guppies.

8. Can guppies live with tetras?

Guppies and tetras can generally coexist peacefully. However, it’s important to select tetra species that are not fin-nippers, as guppies’ flowing fins may be targets. Peaceful tetras like neon tetras or ember tetras are usually compatible tank mates for guppies.

9. Can mollies live with guppies?

Mollies and guppies are both members of the Poeciliidae family and can usually coexist peacefully. However, providing adequate space and hiding spots is important to minimize any potential aggression between the two species.

10. Does cross-breeding guppies work?

Yes, cross-breeding guppies can result in offspring with unique color patterns and traits. Guppy enthusiasts often use selective breeding to create new strains or enhance specific characteristics.

11. How big do guppies get?

Guppies are relatively small fish and typically grow to an average length of 1.5 to 2.5 inches (3.8 to 6.4 cm) for males and slightly larger for females. Some selectively bred strains may exhibit variations in size.

12. How long do guppies live?

On average, guppies have a lifespan of 2 to 3 years. However, they can live up to 4 or 5 years with proper care and optimal conditions.

13. How long does it take for guppies to grow?

The growth rate of guppies varies depending on factors such as genetics, diet, and water conditions. Generally, guppies reach their full adult size within 3 to 5 months.

14. How long does it take for guppies to have babies?

Guppies are livebearers, which means they give birth to live young instead of laying eggs. The gestation period for guppies is typically around 3 to 4 weeks. After mating, female guppies develop a gravid spot near their anal vent, which becomes more prominent as the pregnancy progresses. Once the fries are born, they can swim and fend for themselves immediately.

15. How often do guppies breed?

Guppies are known for their prolific breeding habits. Once mature, females can store sperm from a single mating and produce multiple fry batches without further mating. They can give birth every 4 to 6 weeks, resulting in a continuous reproduction cycle.

16. How to care for baby guppies?

To ensure baby guppies’ survival and healthy development, it’s important to provide them with a suitable environment. A separate breeding tank or breeding net is often used to protect the fry from being eaten by adult fish. Feed them powdered or finely crushed fish food, infusoria, or commercially available fry food until they are large enough to consume regular-sized flakes. A product like Ultra Fresh Baby Fish Food is an excellent choice for baby fries.

17. How many guppies should be kept together?

Guppies are social fish and prefer to be kept in groups of at least 4 to 6 individuals. This helps to minimize stress and encourages natural behavior. However, ensure that the tank size accommodates the guppies comfortably.

18. Are guppies schooling fish?

Guppies are not true schooling fish, but they do exhibit shoaling behavior. They tend to swim and socialize together, providing security and reducing stress. Keeping them in groups allows them to display their natural behavior and vibrant colors more prominently.

19. Are guppies aggressive?

Guppies are generally peaceful and non-aggressive fish. However, occasional aggression or fin-nipping can occur, especially among males competing for dominance or during mating. Providing ample hiding spots and a balanced male-to-female ratio can help mitigate aggression.

20. Will guppies eat shrimp?

In general, guppies are not aggressive towards shrimp. However, if the shrimp are small or newborn fry, there is a possibility that guppies may consider them as food. It’s advisable to provide hiding places or separate the shrimp until they grow larger and are less vulnerable to predation.

21. Are guppies freshwater fish?

Yes, guppies are freshwater fish. They originate from tropical freshwater environments like rivers, streams, and ponds in South America.

22. Are guppies easy to take care of?

Guppies are considered relatively easy to care for, making them suitable for beginner aquarists. They have adaptable and hardy nature, and their small size makes them ideal for smaller tanks. However, proper water quality, nutrition, and tank maintenance are essential for their well-being.

23. Where do guppies come from?

Guppies are native to northern South America, including Venezuela, Guyana, and Barbados. They are naturally found in warm, slow-moving waters with dense vegetation.

24. Are guppies hardy?

Guppies have a reputation for being hardy fish. They can tolerate various water conditions and adapt well to various environments. However, extreme fluctuations or poor water quality can still negatively impact their health and lifespan.

25. Are guppies good with bettas?

Guppies and bettas can coexist in the same tank, but compatibility depends on the temperament of the betta. Some bettas may display aggression towards the colorful and flowing fins of the guppies. Monitoring their interactions closely and providing ample hiding spots can help reduce potential conflicts.

26. Are guppies bottom feeders?

Guppies are not strictly bottom feeders. They are omnivorous and will consume food from various levels of the tank.

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