Keeping Feeder Goldfish: Complete Guide 2021


Last Updated: May 31, 2021

Anyone who’s ever walked through the fish section of a pet store has seen the big tanks filled to the brim with feeder goldfish. These goldfish are bred and sold with the intention of them becoming a meal for larger predatory fish and reptiles, but you’ve likely spotted some very cute goldfish within these tanks. You may have even picked some cute goldfish out and taken them home.

It’s also possible you’ve spotted some sickly-looking fish that you thought you could save. And it’s also possible that you took goldfish home from the feeder tank with the intention of giving them an excellent life, only for them to die within a day or two. If you’ve had your heart broken by feeder goldfish you hoped to save, keep reading for everything you need to know about keeping feeder goldfish.

Why Do People Buy Feeder Goldfish?

feeder gold fish_kaori_Pixabay
Image Credit: kaori, Pixabay

Some people who own predatory animals, like turtles, catfish, gar, and large cichlids, feel that feeding live prey has benefits. Some believe live prey is more nutritious than frozen or processed food options, while others believe the stimulation of hunting is beneficial to the health and wellbeing of their animals. Not everyone is in agreement within the aquatics community about the necessity and benefits of feeding live prey.

Since these fish are sold as food and not as pets, they’re often mass bred and kept in close quarters and poor water conditions. The close proximity and large numbers of fish living together means that diseases and parasites spread quickly. Feeder goldfish are, inherently, less healthy than goldfish that are bred to be pets due to these conditions. They are inexpensive, though, which makes them ideal for people who live feed.

Keeping Feeder Goldfish: What You Need to Know

feeder goldfish_Pixabay
Image Credit: Pixabay
  • They might die: This is the cold, hard truth about feeder goldfish. Sometimes, no matter what you do, they will die. This is because of the conditions they’re kept in before they come home with you. The poor conditions start with the breeding facility and usually carry over to the pet store. Diseases, parasites, and poor water quality are all factors that play into the health of feeder goldfish. They often start their life off in poor conditions that cause lowered immunity and high mortality rates.
  • They need to quarantine: It’s recommended to quarantine any new plants or animals you bring home to your aquarium, but this is extremely important with feeder goldfish. Many times, they carry diseases and parasites that aren’t immediately apparent when you bring them home. In fact, you may bring home a perfectly healthy-looking goldfish. This doesn’t mean there isn’t an underlying condition you can’t see with the naked eye. Quarantine for a minimum of 1-2 weeks, but 4 weeks is ideal. This gives you plenty of time to monitor your new goldfish for signs and symptoms of illness.
  • Prophylactic treatments: Prophylactic treatments are treatments that are performed to prevent illnesses and parasites or to treat them before symptoms begin to show. Some people recommend prophylactic treatment with antibiotics, while others recommend treating with generalized treatments for fungal, bacterial, and parasitic infections. This can help head off illnesses before they become a problem. Be aware, though, that sick, stressed, or low immunity fish may be too weak to survive treatments but treating prophylactically helps you ensure you aren’t introducing a problem into your tank. Treating one or two fish is much easier than treating an entire tank.
  • Plan for a long-term commitment: Goldfish can live extremely long lives! Many goldfish live to be 15 years old, but they can live upwards of 30-40 years. Some feeder goldfish come out of their poor environment with a stronger immune system and higher tolerance for stressful environments. Feeder goldfish are usually common or comet goldfish, which are hardy fish anyway. That 2-inch feeder goldfish you brought home because it looked sad may get very large and be with you for decades.
  • Plan for a Big Fish: Single-tail goldfish like commons and comets tend to live longer and get larger than goldfish bred to be pets, like fancies. These goldfish can reach lengths of 12 inches or more. While there is some truth to the idea that goldfish will only grow to the size of their environment, you still may end up with a goldfish the size of your hand in a 10 or 20-gallon tank. Be prepared for a big fish with a heavy bioload. You will need a suitable tank with a great filtration system to ensure your goldfish has the healthiest environment possible.

Why Did My Feeder Goldfish Change Colors?

goldfish in freshwater_ luckypic_Shutterstock
Image Credit: luckypic, Shutterstock

So, you picked out a cute little goldfish with black speckles all over it. Now that you’ve had it home for a few weeks, you notice that the black spots are fading or gone altogether. There are two potential reasons this can happen. The first is that as goldfish age, it’s not unusual for them to change color. Usually, this color change involves black or bronze colors fading to gold or white, although some white goldfish will turn gold with age as well. You may have just picked a goldfish that is genetically predisposed to change color and lose its black spots.

The other reason that you may notice black spots on your feeder goldfish going away is ammonia poisoning. When goldfish are kept in unhealthy environments with high ammonia levels, like in overstocked breeding tanks, they can develop ammonia poisoning, which can cause irritation and loss of slime coat on the skin. It can eventually lead to fin and tail rot and scale loss. Black spots develop as your goldfish is healing from ammonia poisoning, although their body may begin attempting to heal while still in a high ammonia environment.

Always monitor your water parameters routinely to ensure your tank is staying cycled and has no ammonia. If your black-spotted goldfish suddenly begins to lose its spots, sometimes as quickly as overnight, then they’re likely healing from ammonia poisoning. This often means that you’ve provided a high-quality environment that is allowing the body to heal from the stress of ammonia.

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Conclusion

Bringing home feeder goldfish is an unpredictable thing, so the best you can do for your new goldfish is to be prepared. Make sure you have a fully cycled tank ready to go and a quarantine tank available if your fish will be going into a tank with any other animals. Feeder goldfish can be sickly and, in some cases, impossible to keep alive, no matter how hard you try. You can do everything right and still lose feeder goldfish, so don’t beat yourself up. It can happen to anyone! Some feeder goldfish will come home hardy and ready to take on the world. Since there’s no real way to predict what you’re bringing home, be prepared for all scenarios and be ready for a long-term commitment to your new goldfish.


Featured Image Credit: JuanCarlosPalauDiaz_Shutterstock



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