Guppy Fry Tank Setup - "File:Poecilia reticulata Fry DSC04357 nevit.jpg" by Nevit Dilmen (talk) is licensed under CC BY-SA 3.0.
Guppy Fry Tank Setup - "File:Poecilia reticulata Fry DSC04357 nevit.jpg" by Nevit Dilmen (talk) is licensed under CC BY-SA 3.0.

Why Would You Need a Guppy Fry Tank?

Setting up a separate tank specifically for guppy fry serves several important purposes:

  • Protection from Predators: Adult guppies, including their own parents, may view guppy fry as potential prey. Placing the fry in a separate tank ensures their safety and allows them to grow without the risk of being eaten.
  • Controlled Environment: Doing a guppy fry tank setup allows you to control and maintain ideal water conditions for the fry. Guppy fry are more sensitive to water parameters than adults, so this isolation can help ensure stable and optimal conditions.
  • Customized Feeding: Guppy fry have different dietary needs than adult guppies. They require frequent feedings of small, protein-rich foods. In a dedicated fry tank, you can provide specialized fry food and closely monitor their feeding to ensure they receive proper nutrition.
  • Health Monitoring: Guppy fry are susceptible to diseases and parasites. Separating them from the main tank makes it easier to monitor their health and treat any issues promptly without affecting the adult fish.
  • Growth and Development: Guppy fry grow quickly and can become stressed or outcompeted by adult fish for food and space. A separate guppy fry tank provides ample space for their growth and development, preventing overcrowding.
  • Selective Breeding: If you are selectively breeding guppies for specific traits or colors, a fry tank allows you to isolate and monitor the fry for desired characteristics. This is essential for maintaining and improving the quality of your guppy strains.
  • Breeding Management: By isolating pregnant female guppies in a separate breeding or birthing tank, you can easily transfer them to the fry tank once they give birth. This ensures that the fry are immediately protected from adult guppies and predators.
  • Stress Reduction: Guppy fry can be easily stressed by the presence of larger fish. A dedicated fry tank provides a stress-free environment, which is essential for their overall well-being.

In summary, creating a guppy fry tank setup is essential for ensuring the survival and healthy development of guppy fry. It allows you to provide the necessary care, control, and protection that young guppies need during their early stages of life.

How To Do a Guppy Fry Tank Setup

Setting up a guppy fry tank requires careful consideration to provide a safe and healthy environment for the young guppies (fry) to thrive. Here’s a step-by-step guide to do a guppy fry tank setup:

  • Select a Suitable Tank: Choose a small aquarium or a separate section within your main tank for the fry. A 10 to 20-gallon (40-80 liters) tank is usually sufficient. Ensure the tank is clean and free from any contaminants.
  • Filtration: Use a sponge filter or a low-flow filtration system to prevent fry from getting sucked into the filter. Guppy fry are very tiny and can easily be harmed by strong currents.
  • Heating: Maintain the water temperature between 78°F to 82°F (25°C to 28°C) since guppy fry are sensitive to temperature fluctuations. A small heater with an adjustable thermostat can help achieve this.
  • Substrate: Opt for a fine-gravel substrate or a bare-bottom tank, as it makes it easier to clean and prevents debris from accumulating, which could harm the fry.
  • Plants and Decorations: Include live or artificial plants to provide hiding spots and mimic their natural environment. Floating plants can be especially beneficial for fry to hide among.
  • Lighting: Keep the lighting dim or use a timer to simulate a natural day-night cycle. Guppy fry are sensitive to bright light, so avoid harsh lighting.
  • Water Quality: Maintain good water quality by performing regular water changes. For fry, smaller, more frequent water changes (10-20% every few days) are better than larger ones.
  • Water Parameters: Keep the water parameters stable. Test the water regularly for ammonia, nitrites, and nitrates to ensure a healthy environment.
  • Monitoring: Keep a close eye on the fry’s development and health. Remove any sick or dead fry promptly to prevent the spread of disease.
  • Grow-Out Tank: As the fry grow, you may need to transfer them to a larger tank to accommodate their increasing numbers and size. A 20-gallon (80 liter) tank is suitable for the grow-out stage.

By following these steps and providing proper care, you can raise healthy and vibrant guppy fry into mature, colorful adult guppies. Remember that guppies breed prolifically, so be prepared for the possibility of more fry in the future.

Guppy Fry Tank Setup - "File:Poecilia reticulata Fry DSC04357 nevit.jpg" by Nevit Dilmen (talk) is licensed under CC BY-SA 3.0.
Guppy Fry Tank Setup – “File:Poecilia reticulata Fry DSC04357 nevit.jpg” by Nevit Dilmen (talk) is licensed under CC BY-SA 3.0.

Feeding Guppy Fry

Feeding guppy fry is a crucial aspect of their care, as they require a diet rich in protein to grow and develop properly. Here’s a guide on how to feed guppy fry:

  • Infant Food (First Few Days): Guppy fry are initially very small and may not be able to consume standard fish food. You can start by feeding them infusoria, which are tiny aquatic organisms that serve as an excellent first food for fry.
  • Commercial Fry Food: After the first few days, you can transition to commercial fry food specifically designed for small fish. These foods come in various forms, such as powdered or crushed flakes, granules, or pellets. Ensure the food particles are small enough for the fry to eat easily.
  • Baby Brine Shrimp: Baby brine shrimp are highly nutritious and are a favorite food for guppy fry. You can hatch and harvest baby brine shrimp at home using a brine shrimp hatchery. Rinse the hatched brine shrimp and feed them to the fry. The movement of live brine shrimp in the water can also stimulate the fry’s hunting instincts.
  • Frequency of Feeding: Guppy fry have small stomachs and require frequent feedings. Aim to feed them small amounts multiple times a day, typically 4 to 6 times. Offer only as much food as they can consume in a few minutes to avoid overfeeding, which can lead to poor water quality.
  • Variety in Diet: To ensure a well-rounded diet, rotate between different types of food. This helps provide a variety of nutrients and keeps the fry interested in eating. For example, you can alternate between powdered fry food, baby brine shrimp, and microworms.
  • Monitor Growth: Pay close attention to the growth and development of the fry. If they appear thin or their growth seems stunted, consider increasing the frequency of feedings or supplementing their diet with additional protein-rich foods.
  • Water Quality: Maintain excellent water quality in the fry tank, as poor water conditions can affect their appetite and overall health. Perform regular water changes and monitor ammonia, nitrite, and nitrate levels.

Remember that guppy fry grow rapidly, and their dietary needs change as they mature. As they get larger, you can gradually introduce crushed or finely powdered adult guppy flakes and pellets to their diet. By providing a balanced and nutritious diet, you can help your guppy fry grow into healthy and colorful adult guppies.


In conclusion, setting up a guppy fry tank is a critical step in ensuring the well-being and successful growth of these tiny fish. By providing the right environment, nutrition, and protection, you can create an ideal space for guppy fry to thrive. Here are the key takeaways from a guppy fry tank setup:

  • Select the Right Tank: Choose an appropriately sized tank with gentle filtration, heating, and suitable decorations to create a safe and comfortable environment.
  • Maintain Water Quality: Regular water changes and monitoring of water parameters are essential to keep the tank’s conditions stable and free from harmful toxins.
  • Feed Properly: Offer a varied diet that includes specialized fry food, baby brine shrimp, and other small live or commercial foods to meet their protein needs.
  • Provide Hiding Spots: Incorporate plants and decorations to offer hiding places for the fry, reducing stress and promoting natural behaviors.
  • Monitor Growth: Keep a close eye on the fry’s development and health, adjusting care and feeding as needed.
  • Separate from Adults: Protect guppy fry from potential predators, including adult guppies, by isolating them in their own tank or using breeding traps.

By following these guidelines and providing diligent care, you can raise healthy and vibrant guppy fry, setting the stage for a thriving guppy population in your aquarium. Remember that guppy fry tank setup is just the beginning of your journey in successfully breeding and maintaining these popular and colorful fish.