API Goldfish Aquarium Cleaner, slide 1 of 1

API Goldfish Aquarium Cleaner, 4-oz bottle

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Cleaning your goldfish's home will be easier than ever with a Goldfish Aquarium Cleaner from API. Made with beneficial bacteria cultures, this unique cleaner is a quick and effortless way to naturally break down the junk floating around your aquarium—even the stuff you can't see. Waste, uneaten food, and other organic matter can work together to fog your pals' tank with toxic junk, which may cause stress, illness and ultimately harm or kill your fish. But API's aquarium cleaner helps to clean gravel, works to remove sludge and help to reduce ammonia and nitrite levels as a result! Use once-a-week, during your regular water change, to help keep your fish's environment clean and healthy.

Key Benefits
  • Helps to clean the aquarium by breaking down solid waste.
  • Supports a healthy aquarium environment made from real, beneficial bacterial cultures and without adding more chemicals to your tank.
  • Helps to naturally break down solid waste, clean gravel, remove sludge and reduce ammonia and nitrite.
  • Can be used during your normal water change to keep your tank or bowl clean.
  • Helps to reduce toxic ammonia and nitrite by boosting the effectiveness of the biological filter in established aquariums.

Limit all unnecessary personal contact. Wear protective clothing when risk of exposure occurs. Use in a well-ventilated area. When handling DO NOT eat drink or smoke. Always wash hands with soap and water after handling. Avoid physical damage to containers. Use good occupational work practice. Observe manufacturer's storage and handling recommendations.

Special Note

4-oz bottle treats up to 47 gallons.

Help your goldfish live in a safe environment with API's Goldfish Protect.

See all items by API

  • Item Number
  • Aquarium Type
    Freshwater, Pond
  • Fish Type
  • Product Form
  • Store in original container.
  • Keep containers securely sealed.
  • Store in a cool, dry, well-ventilated area.
  • Store away from incompatible materials and foodstuff containers.
  • Protect containers against physical damage and check regularly for leaks.


API GOLDFISH AQUARIUM CLEANER adds beneficial bacteria to your tank that break down organic matter (which can cause ammonia or nitrite poisoning in your goldfish if left untreated).


Use API GOLDFISH AQUARIUM CLEANER when starting a new goldfish tank, and every time you perform a partial water change.

Fish Care Made Easier

API is a name you can trust when it comes to taking care of fish. Not only are they passionate about fishkeeping, but they're dedicated to improving the hobby and making it easier to maintain the ideal aquatic environment. From helping the novice set up a new tank to providing state-of-the-art filters for advanced systems, you can rely on API's dedication to quality.

Fish Care Made Easier
Maintain the Perfect Setup

Maintain the Perfect Setup

Fishkeeping is a much easier task with API, because they've taken all the guesswork out of setting up a tank and maintaining it. Their proven treatments include water conditioners and clarifiers, fish medications, pH adjusters, algaecides and quick-start solutions—all designed to keep your aquarium crystal clear and your fish happy and healthy.

Testing Is Key

Once you've started a new aquarium, the only way to keep it in perfect balance is with routine water testing. API gives you all the tools you need to create a nurturing environment for both fish and live plants. Their comprehensive Master Test Kits are tailored to freshwater, saltwater or reef environments, and individual tests for things like pH, ammonia or nitrites leave nothing up to chance.

Testing Is Key
Clearing the Water

Clearing the Water

API offers reliable three-step filtration for tanks of all sizes with their FILSTAR XP Canister filters and wide variety of filter media. These powerful filters constantly circulate the water, trapping organic waste and odors, removing harmful ammonia and contaminants, and helping good bacteria to thrive in the tank.

Superior Nutrition

Feeding your aquarium inhabitants, whether they're tropical fish, turtles or newts, is something that can be tricky without the right food. API developed a special diet for every type of fish—one that's highly palatable, which leads to less waste in the tank. And that means less ammonia to cloud the water. For your turtle friends, premium floating pellets and stick treats provide multiple vitamins for a stronger, healthier shell.

Superior Nutrition
About API

About API

Through extensive and continuous research and development, API created quality products for all levels of fishkeeping. As people who are passionate about fish care, they understand the rewards of keeping up a successful aquarium or aquarium. With easy-to-read guides and premium treatments, foods, filters and testing equipment, API helps aquarists establish and maintain an environment where fish can flourish.

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Rating: 3.3 of 5 stars 8 Reviews 8 Reviews 3.4 out of 5 Stars

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Rating: 3.3 of 5 stars 3.4 / 5

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8 Reviews

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  • 5 out of 5 stars

    Only thing that works

    By CatMama on May 12, 2020

    This is the only product that actually removes the ammonia from my fish tank and keeps it away. My goldfish no longer has ammonia burns and is thriving.

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  • 2 out of 5 stars

    Didnt work at all for my tank still cloudy after water change and this product.

    By Gramby on Oct 18, 2019

    Dont work i used it regularly and it did not change the water clarity at all.

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  • 5 out of 5 stars

    Excellent products

    By Love on Apr 2, 2019

    This product is amazing Works good you don’t need a lot of product. and it works Extremely good water stays clear and cleanI highly recommend this product

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  • 1 out of 5 stars

    does not seem to work

    By bads on Apr 8, 2019

    I have used four bottles and have seen no deafferents filter still slims up bad might work for others but not me

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  • 1 out of 5 stars

    It did nothing

    By Janice on Jun 9, 2018

    I purchased a couple bottles and it didnt do a thing.

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  • 5 out of 5 stars

    Keeps the tank clean!

    By Naya on Mar 25, 2018

    This stuff keeps my goldfish tank clear, and clean! I have to change filters less often and change water less often.

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  • 5 out of 5 stars


    By bojack on Aug 25, 2017

    I have been fighting cloudy water in my 75 gal goldfish tank. Nothing would keep it clean .One a week 25% or more water change still would not get the water clear. Then once a month or so I would get this slime in the tubing. This stuff was nasty. It looked like it could be alive. With this product no more slime the water in the tank is so clear it is unreal. It takes about a 1/2 bottle per water change but it is well worth it.I have tried several different products nothing compares to this.

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  • 3 out of 5 stars

    No Difference

    By Amyluthien on Dec 20, 2016

    I didn't notice that this product made a difference in anyway to the water quality or the health of my goldfish. Also, the bottle is quite small, so if you have a larger aquarium, you'll need to order more than one bottle.

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