“Constipated goldfish” is the most widely over diagnosed case on the internet. Most commonly, goldfish “constipation” is misdiagnosed as a cure all for a sick fish. And in comes the main treatment… feeding goldfish peas! But even with the incorrect diagnosis, your fish gets better! What is going on with these shelled green peas?
But why does feeding goldfish peas make them better if they’re not sick?
Reason #1: Improved water quality
When you feed your fish green peas, they have almost no protein whatsoever, decreasing the amount of ammonia waste from your fish, decreasing the strain on your nitrogen cycle. Decreasing the ammonia waste from your system will make ANY fish better. Every 100 grams of green peas contains 5.4g of protein. Compare that to 100g of commercial fish flake and pellets having between 32-45g of protein.
Goldfish should be maintained on a diet of 30-32% protein. If you are feeding a diet not intended for goldfish, be sure to check your fishes’ food! Tropical fish diets are usually significantly higher and should not be fed to goldfish, no matter how tasty they are. Learn more about the right food to feed your goldfish.
Reason #2: Sinking diet
Green peas sink in water, therefore making fish dive to the bottom of their tank to eat, preventing excess air from ending up in their GI and swim bladder. Goldfish are physostomous, with a duct connecting their esophagus to their swim bladder. Considering the anatomy of some fancy goldfish varieties, these ducts are extremely short and therefore more air is able to get into the swim bladder, causing positive buoyancy issues. When fish eat at the surface, slurping food down like pigs, they can take in a lot of extra air. By feeding fish green peas, which sink, they don’t suck in as much air.
Reason #3: Better quality diet
Goldfish “indigestion” can be caused by an inappropriate diet. Goldfish, like all other carp, are omnivores, eating plants, bugs and almost anything tasty that fits in their mouths. In feeding them a flake or pelleted diet, you are aiming for a balanced diet. There are sooooo many fish foods out there, and a lot of them are based on educated guesses rather than actual research.
The age of your fish’s food will also influence its nutritional value. If you store your fish’s food correctly, you will get about 6 months out of one container. After that, it’s got to go! Feeding your fish green peas can certainly add in missing nutrients your ancient fish food is severely lacking.
As a fish owner, it is up to you to evaluate your fishes’ food to make sure it is appropriate. We have our most watched webinar on this very subject of reading fish food labels. Many of these “constipation” problems are from feeding very old food. After 6 months, your fish food has lost enough of the water-soluble vitamins, including vitamin C, that you are essentially feeding your fish cardboard. Getting a fresh bag of food, or switching the diet to our green peas, fixes almost all of the fish “indigestion” cases we see.
But what about all that fiber?
100g of peas contains 4.8g of fiber and most fish foods contain 3-5g of fiber, so it’s not really all that more fibrous. Not to mention, many pet fish, such as koi and goldfish, don’t have “true” stomachs like us or your fuzzy pets, so it is harder for them to digest fibrous materials. Dried green peas have considerably more fiber due to the decreased water content, but these should not be feed to fish. When added to water, the peas will rehydrate and can cause damage to a fish’s delicate GI tract.
All in all, peas are a low calorie treat that fish can enjoy. But are they magical, cure all tablets of greeny goodness? Sorry, but no.
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- Your Goldfish is NOT Constipated
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