Are Goldfish Good For Aquaponics? 

Goldfish are a popular choice for aquaponics enthusiasts, but what makes them stand out from other aquatic species? In our latest blog post, we delve into the benefits and challenges of incorporating goldfish into your aquaponics system.

Discover their adaptability, hardiness, and compatibility with various plants, and compare them to other aquaponics-friendly species, such as koi and shrimp. Dive deep into our blog and find out if goldfish are the perfect addition to your aquaponics garden.

What are the best fish for Aquaponics?
Fish speciesIdeal water temperature rangeIdeal pH rangeGrowth rateComments
Tilapia68-86°F (20-30°C)6.5-9.0FastEasy to raise and a popular choice for aquaponics systems. Can tolerate a range of water conditions.
Trout50-68°F (10-20°C)6.0-8.0FastGood for cooler water systems, but require more oxygen than other fish species.
Catfish75-85°F (24-29°C)6.5-8.0ModerateHardy and easy to raise, but can be aggressive towards other fish.
Koi59-77°F (15-25°C)7.0-8.0SlowColorful and attractive fish that can grow quite large, but require more space than other species.
Goldfish68-72°F (20-22°C)7.0-8.4SlowHardy and easy to raise, but produce more waste than other species.

Are Goldfish Good For Aquaponics?

Goldfish are a popular choice for aquaponics because they are hardy and can tolerate a wide range of water conditions. In addition, they are easy to care for and breed prolifically.

Taking care of your fish is simple: just give them clean water and feed them occasionally (they’ll eat algae or waste from the system when they need food). 

This makes it easier than having to take care of other types of fish like koi or tropicals which require more complex systems set up specifically for their needs.

To keep an aquaponics system at its best, you need to learn about the optimal frequency of water changes. Our article on how often do you have to change water in aquaponics? can help you determine the suitable time to change your aquaponics system water.”

How Many Goldfish In An Aquaponic Setup?

The answer to this question is based on numerous factors, such as the size of your system and whether or not you’re using live plants. 

A general rule of thumb is 1 goldfish per 10 gallons of water, but as I mentioned above, this can vary depending on what type of fish you have and how much plant material is in your system.

With that said, here are some examples:

If you have a large pond with live plants growing in it, then one could expect anywhere between 5–10 goldfish per 100 gallons (378 liters). In this case, 10 might be pushing it but that’s just me being cautious!

For an aquaponic setup with plastic tubs filled with gravel or clay pebbles at different levels (e.g., grow beds), let’s say around 2–3 inches deep each for simplicity’s sake.

You could probably fit about 6–8 adult fish comfortably without having them bump elbows too often as they swim around searching for food particles from their waste or feedings from above ground level when grown food isn’t available yet due to colder temperatures during winter months where everything slows down during those months anyways.

Can Goldfish Live Without Food?

Goldfish are omnivores, meaning they can eat plant-based and animal-based foods. However, it’s important to note that goldfish will not thrive on an all-vegetable diet. 

If you plan on feeding your fish a vegetarian or vegan diet, you should do your research and make sure that the food you’re feeding them is nutritionally complete.

There are two main types of goldfish: fancy (e.g., Comets) and hardy (e.g., Shubunkins). Fancy goldfish have been bred over generations to be smaller than hardy varieties (which are generally larger).

So they generally require more frequent feedings than their larger counterparts especially if they’re kept in smaller tanks or aquaponics systems with limited filtration capacity. 

Since these fish are often kept by novice pet owners who don’t know much about proper care practices yet (and/or don’t have access to adequate resources).

We recommend starting out with a hardier variety like Shubunkins rather than Comets if possible because they tend not need as many feedings throughout their lives (assuming those feedings aren’t being done improperly).

Are you looking for a way to grow vegetables that are free from harmful chemicals and pesticides? Then aquaponics is a great option you can consider. Our article on what vegetables can be grown in aquaponics? highlights some of the best vegetables to grow in aquaponic systems that are easy to maintain.

How Long Can A Goldfish Live Without Food?

A lot longer than you think. You might think that if you don’t feed your goldfish for a few days, they will die. But no, they can live for a long time without food: weeks and months and years even! 

This is because goldfish are herbivores (plant eaters). They don’t need much meat in their diet to survive and grow strong as carnivorous fish do.

As long as you keep the water clean and your aquaponics system cleans out any algae build-up on rocks or plants, then your fish should be fine without food for weeks at a time.

Do Fish Like To Be Petted?

Before you get started with your goldfish, it’s important to understand that they are very social animals. While some fish prefer solitude, this isn’t true of goldfish. They enjoy being petted, and will often swim right up to you when you walk into the room.

Goldfish can be taught to fetch objects or do tricks such as swimming through hoops or jumping over obstacles. They’re also intelligent animals that can be trained to respond reliably when their name is called in an upbeat tone (a technique known as “clicker training”).

Using aquaponics at home is not only practical but also environmentally friendly. With a reliable guide, you can get started on using aquaponics to grow your vegetables at home. Our article on how do you use aquaponics at home? Find out provides valuable insights on how to start using aquaponics for your homegrown plants.

What Diseases Do Goldfish Have?

Goldfish are susceptible to a variety of diseases, some of which are fatal. The most common are bacterial infections and fungal infections. 

They can also be affected by parasitic infections, gill disease, fin rot, popeye, and dropsey (a condition in which the fish loses its balance), and swim bladder disease (which makes it difficult for a fish to float), viral infections such as piscine reovirus (PRV).

Do Fish Like Noise At Night?

Goldfish are nocturnal, meaning they are most active at night. If you have ever owned a goldfish, then you know what this means: they will be active when you are not. 

It is perfectly normal to hear your fish swimming around or gasping for air when it is dark out and quiet in the room.

If you aren’t used to having animals that make noise at night, then this may be unsettling at first especially if the sound comes from your aquarium instead of a pet store! 

However, rest assured that your goldfish are just doing what comes naturally; there’s nothing wrong with them or their environment it’s just how things work out sometimes.

Do you know the general principle behind aquaponics, and how it works? Our article on what is an aquaponics system? How do they work? will provide you with a solid understanding of how aquaponics work, and the components required to build an efficient aquaponic system

What Makes A Goldfish Sick?

Goldfish are a great addition to your aquaponics system. They’re easy to care for, can live in small spaces, and provide a source of food when they die (although you still shouldn’t let them go to waste). 

However, there are some things you should know about goldfish before you decide to add them to your aquaponics system.

How Can I Tell If My Fish Is Stressed?

To determine if your fish is stressed, look for the following symptoms:

Gasping or sucking at the water surface – This indicates that the fish is trying to absorb oxygen from the air. It also means that there isn’t enough dissolved oxygen in their aquarium water.

Pinched-looking eyes – While it may seem strange, this symptom of stress is actually due to too much dissolved carbon dioxide in the tank water.

Floating on its side – This indicates a problem with buoyancy control that would make it impossible for them to swim upright when agitated. 

The most common cause of this problem is low levels of dissolved oxygen and/or high levels of ammonia or nitrates in your aquaponics system which can contribute to poor respiration (breathing).

You can reduce stress by ensuring proper filtration and aeration as well as maintaining consistent temperatures throughout winter months while keeping goldfish indoors during cold weather periods (below 50 degrees Fahrenheit).

Why Is My Fish Looking For Food But Not Eating?

It is important to provide your goldfish with a proper diet. If the algae in your system aren’t enough to sustain them, adding in other food sources will be needed. Goldfish are omnivores and will eat algae, insects, and small fish if given the opportunity. 

They are not very good at eating algae though so if you have a problem with that in your system then you may need to feed them something else such as brine shrimp or commercial pellets designed for freshwater aquariums (with no salt added).

Building an aquaponic system requires an investment, both in terms of time and finances. To help you decide if investing in an aquaponic system is worth it, we have created an informative article on how much does an aquaponics system cost? Explained. that provides useful tips and insights on the cost of building and maintaining an aquaponic system, and its corresponding benefits.

Goldfish Are Good For Aquaponics And Will Thrive In This System

Goldfish are a good choice for beginners and those who want to simply enjoy their fish, since they require minimal maintenance. They are hardy and robust, so you don’t need to worry about keeping them alive in your aquaponics system. 

Plus, goldfish are very child-friendly and can thrive in small spaces without getting too big (as long as they’re not allowed to breed). Fish excrete waste materials into the water that build up over time if left untreated. 

This causes an ammonia spike which is toxic to living creatures and must be removed from your system or else it will damage your plants’ roots and cause algae growth on aquarium walls!

The best way I’ve found to prevent these spikes is by growing aquatic plants like duckweed around my filter intakes; this absorbs excess nutrients out of my system before they can become harmful. 

Additionally, if we had any issues with our water quality or pH levels changing rapidly due to weather conditions outside then we could just pull out some duckweed from around our filters which would help fix things quickly enough until we got back on track with maintaining proper nutrient levels inside again once things cooled down again outside.”


In conclusion, goldfish are a good choice for aquaponics if you are not looking to eat fish. They can help keep your water clean, provide aeration and nutrients for your plants, and they don’t require much attention on your part.

Common vegetables and fruits for aquaponics systems

Plant TypesNutritional ValueGrowth Rate
Leafy Greens (Kale, Lettuce, Spinach)Rich in vitamins and minerals (vitamins A, C, K, and iron), quick to mature, easy to grow, and popular in salads.Fast growth rate.
Herbs (Basil, Oregano, Mint, Parsley)Rich in vitamins and minerals (vitamins A, C, and K, and iron), used for medicinal and culinary purposes, flavorful and aromatic.Moderate to fast growth rate.
Fruits and Vegetables (Tomatoes, Cucumbers, Strawberries)High in vitamins and minerals (vitamins A, C, K, potassium, and fiber), juicy and flavorful, great for snacking and salads.Slow to moderate growth rate.

Further Reading

Here are some additional resources to learn more about aquaponics:

Aquaponics: The Complete Step-by-Step Guide: A comprehensive guide that covers everything you need to know about aquaponics, including how it works, the benefits, and how to set up your own system.

How to Make an Aquaponic Garden: Requirements: This article provides a detailed list of the equipment and materials you need to build your own aquaponic garden.

What is an Aquaponics System? How Do They Work?: This resource explains the basics of aquaponics, including how it works, the types of fish and plants that can be used, and the benefits of the system.

How Often Do You Have to Change Water in Aquaponics?: This article provides guidance on how often you should change the water in your aquaponic system to maintain healthy plants and fish.

What Vegetables Can Be Grown in Aquaponics?: A helpful resource that lists the types of vegetables that can be grown in an aquaponic system, as well as tips for growing them successfully.

How to Raise Goldfish in Aquaponics: This article provides guidance on raising goldfish in an aquaponic system, including the types of goldfish that are best suited for the system and the ideal water conditions.

Goldfish Aquaponics 101: A comprehensive guide that covers everything you need to know about raising goldfish in an aquaponic system, including the benefits, the best types of goldfish to use, and how to care for them.


What is aquaponics?

Aquaponics is a type of farming that combines aquaculture (the raising of fish) with hydroponics (the growing of plants in water). It is a sustainable and efficient way to produce both fish and vegetables in the same system.

How does an aquaponic system work?

In an aquaponic system, fish are raised in a tank or pond. The water in the tank is circulated through a grow bed, where plants are grown in a soilless medium. The plants absorb the nutrients in the fish waste, which helps to clean the water before it is returned to the fish tank.

What are the benefits of aquaponics?

Aquaponics is a sustainable and eco-friendly farming method that uses less water and produces less waste than traditional farming. It also allows for the production of both fish and vegetables in the same system, which can be a great way to save space and increase productivity.

What kind of fish can be used in an aquaponic system?

There are many types of fish that can be used in an aquaponic system, including tilapia, trout, catfish, and koi. The best fish for your system will depend on factors such as the climate, the size of your tank, and your personal preferences.