When Can Guppy Fry Go with Adults: (A Comprehensive Guide)

Introducing new members to your aquarium can often be exciting and challenging. Guppies, small and colorful freshwater fish, are popular among beginner and experienced fishkeepers. But when can guppy fry go with adults?

However, it is crucial to understand the appropriate time to introduce guppy fry, the baby fish, to the adult guppy’s main tank.

Guppy fry is typically born after a gestation period of approximately four weeks. They are tiny and vulnerable at birth, making them easy prey for adult fish, including their parents.

molly frys

Therefore, separating the fry from the adults is essential for their survival.

Keeping baby guppies separate from adult guppies until they are at least one inch long is generally recommended. This allows them to establish strength and easily fend for themselves in a larger tank with adult fish. 

Additionally, separating adults from fry prevents them from consuming it as a food source.

Understanding the appropriate time to introduce guppy fry to adults ensures their safety and helps maintain a harmonious and healthy aquarium environment.

Can Guppy Fry Thrive In a Community Tank?

Guppy fry might survive in a community tank. Still, their chances of survival may depend on factors such as the size of the tank, the number of adult fish in the tank, and the availability of hiding spots for the fry. 

In a community tank, adult fish may view guppy fry as potential prey and may try to eat them. Therefore, it is essential to provide hiding spots for the fry, such as live plants or decorations, to keep them safe. 

Why Guppy Fish Staying at Top of Tank

Keeping your guppy fry safe in a community tank can also involve separating them from adult fish or transferring them to a different tank until they are large enough to avoid get eaten. Additionally, feeding the fry small amounts of food can help them proliferate and increase their chances of survival.

Guppy fry can live in a community tank with the right conditions and precautions. Still, monitoring their safety and taking necessary steps to protect them from adult fish is essential.

When Can Guppy Fry Go with Adults?

Can guppy fry survive with adults? Guppy fry, or baby guppies, should typically be separated from adult guppies until they are large enough to avoid being eaten by the adults.

The exacted timing can vary based on the fry’s growth rate and the adult guppies’ size. Still, a general guideline is to wait until the fry are around 1 inch (2.5 centimeters) long before introducing them to the adult population.

Guppy fry is usually better equipped to survive in a tank with adult guppies of this size. They will be more agile and better able to escape any potential predation. Additionally, they will have had time to develop their coloration and markings, making them less likely to be mistaken for food by adults. 

Remember that guppies are known for their prolific breeding. If you keep both adults and fry together, the fry will likely continue to reproduce, leading to an ever-increasing population in your tank.

Suppose you are a guppy fish breeder and wish to control the population growth. In that case, it is recommended to separate the fry from the adults and provide them with their own tank or breeding net until they reach a suitable size to join the adult population.

Note: When a pregnant guppy gives birth, some baby guppies (fry) may become infected with parasites. Adding these infected fry to the mother guppy main tank can make all the fish in the tank sick.

How To Feed Guppy Fry In A Community Tank

Feeding guppy fry in a community tank requires a delicate balance between providing enough nourishment for the fry without overfeeding the other fish. It is essential to consider the size of the fry and choose the appropriate food.

Newly hatched brine shrimp or micro worms are ideal for the tiny guppy fry. These can be easily obtained at pet stores or bred at home. Feeding the fry three to four times daily in small amounts is recommended to ensure they receive enough nutrients.

However, removing excess food after a few minutes is advisable to prevent overfeeding the other fish. Another option is to use a separate breeding box or feeding tank where the fry can be isolated and fed without disturbing the other fish.

Additionally, it is vital to maintain good water quality in the community tank to ensure the health and development of the guppy fry. Regular tank water changes and a reliable filtration system are necessary to keep the tank clean and provide optimal conditions for the fry to thrive.

How To Care for Baby Guppies in the Fish Tank?

 Taking care of guppy fry is relatively easy once you have some knowledge about their specific needs:

  1. It is crucial to provide them with a well-maintained tank heated to around 78-82°F. Guppy fry requires clean and warm water to thrive and grow.
  2. They are good eaters and should be fed high-quality fry food several times daily. It is crucial to remove any uneaten food to maintain water quality. Guppy fry are highly social and should be kept in a group to prevent stress.
  3. Regular water changes and monitoring water parameters such as ammonia and nitrate levels are essential for keeping the fry healthy.

Guppy fry can grow into beautiful, vibrant adult fish with proper care.

How Often Do Guppies Need to Eat?

Guppies are small tropical fish that are known to be voracious eaters. Therefore, they have high metabolism rates and need to eat frequently. Ideally, guppies should be fed small meals two to three times a day.

Providing them with various food options is crucial to ensure they receive nutrients. This can include commercial guppy pellets or flakes, frozen foods, and live foods such as baby brine shrimp or daphnia. Overfeeding should be avoided as it might lead to obesity and other health issues.

Observing the guppies’ behavior after feeding is essential to determine if they have consumed enough. Adjustments can be made to ensure they get the appropriate amount of fish food to maintain their health and vitality.

How to Add Baby Guppies to the Main Tank?

Adding young guppies to the main tank can be an exciting experience for any aquarium hobbyist. However, it’s essential to take specific steps to ensure the safety and well-being of the young and adult guppies in the main tank. Here are some steps you can follow:

  • Provide a breeding tank: To breed guppies, you should provide a separate breeding tank where adult guppies can mate and lay eggs. This will prevent the adult guppies from eating the fry and increase the survival rate of the young guppies.
  • Give the fry a hiding spot: Once they are born, it’s essential to provide them with a hiding spot in the breeding tank. You can use plants, rocks, or other decorations to create a safe space for the fry.
  • Feed your adult guppies: While the fry is still in the breeding tank, feed your adult guppies well. This will decrease the likelihood of them eating the fry.
  • Move the fry to the main tank: Once large enough to swim freely, you can move them to the main tank using a fishnet. It’s essential to gradually acclimate the fry to the main tank’s water condition.
  • Create hiding spots in the main tank: To increase the survival rate of the fry, create hiding spots in the main tank using plants, rocks, or other decorations. This will provide the young guppies a safe space to hide from adult guppies and other fish in the tank.
  • Monitor the young guppies: Keep an eye on them as they adapt to their new environment in the main tank. Ensure they eat well and are not being bullied by adult guppies or other fish in the tank.

Following these steps, you can successfully add young guppies to the main tank and ensure their survival. Remember to be patient and give the fry time to adapt to their new environment.

How Long Does Guppy Fry Need To Be Separated?

If you have a breeding tank for your guppies, it is recommended that you separate the guppy fry from the adult fish as soon as they are born. This will help to stop the adult guppies from eating the babies. 

Guppy fry are tiny and vulnerable, so providing them with a separate tank where they can develop without being threatened by larger fish is crucial. Once the guppy babies are around 6 to 8 weeks old and have reached at least an inch in length, they can usually be safely transferred back to the main tank with the adult fish.

If you need a separate breeding tank, you can separate your male and female guppies to prevent them from breeding and producing fry. Alternatively, you can provide plenty of hiding places in the main tank for the baby guppies to avoid being eaten by adult fish.

Overall, the time that guppy fry needs to be separated depends on their age and size. Young guppies are particularly vulnerable to predation, so it is vital to keep them separated until they are large enough to fend for themselves.

This usually takes a few months of age and at least an inch in length. Female fry should be separated once they reach 6 to 8 weeks old to prevent them from breeding with male fry.

Common Questions about When to Keep Guppy Fry with Adult Fish (FAQ)

When can guppy fry go with adults?

When can baby guppies go in with adults? Guppy fry can typically go with adults when they are big enough to go into the main tank, usually when they are about one month old and about one inch in size.

Do guppies eat their fry?

Adult guppies may eat their fry; keeping it in a separate tank is recommended.

How fast do guppies grow?

Guppies grow pretty fast. Typically, they will reach their full size within a few months.

Can guppies be kept with bigger fish?

Keeping guppies with significantly bigger fish is not recommended, as they may become prey.

How do you breed guppy fry?

You will need a separate tank with male and female guppies to breed guppy fry. The mother guppy will give birth to live fry, which can then be moved to a separate tank to ensure survival.

What should I do when baby guppies are born?

When baby guppies are born, they must have a separate tank to keep them safe from adult guppies.

Can guppy fry eat her babies?

Pregnant female guppies generally do not eat their babies. However, in some cases, they may eat guppy fry if they feel stressed or threatened.

How many adult guppies can be kept with guppy fry?

The number of adult guppies that can be kept with guppy fry depends on the tank size. It is recommended to have sufficient space for all the fish.

Can I put guppies in the main tank with fry?

Putting guppies in the main tank with fry is not recommended as there is a risk of the fry being eaten by adult guppies.

What should I feed guppy fry?

Guppy fry usually doesn’t feed on regular fish food. They should have baby brine shrimp or crushed egg yolk for nutrition.


In conclusion, if you’re wondering when can guppy fry go with adults in the same tank, it’s essential to ensure their safety and well-being. While guppy fry are born with a survival instinct, they are small and vulnerable, making them easy targets for larger fish. It’s best to wait until they reach a suitable size and show signs of maturity before introducing them to the company of adult guppies. By providing a nurturing environment, plenty of hiding spots, and a well-balanced diet, you can help the fry develop into healthy and robust individuals.

Patience is vital when it comes to raising guppies, as rushing the process can lead to unnecessary casualties. Allow the fry to grow and thrive in a separate tank before considering their integration with the adults. Remember, the final goal is to create a harmonious and thriving community of guppies. By understanding the right time to introduce fry to adult fish, you can ensure their successful integration and enjoy the wonders of a vibrant and diverse aquarium.

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About Me

I am the founder of, a devoted wife and mother, and an avid fish enthusiast. My aim is to assist fellow fish lovers worldwide in understanding how to properly care for and breed their pet fish.

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