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API Furan-2 Medication - 10ct Powder Packets

API Furan-2 Medication - 10ct Powder Packets


Item #: AP1831

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Unit Price

1 - 2


3 - 5


6 - 11


12 - or more


Temporarily Out of Stock

API Freshwater/Saltwater Carbonate Hardness (KH) Test Kit

API Furan-2 powder is a strong antimicrobial compound for use in both freshwater and saltwater systems. Note: This medication will cause a slight discoloration of water which can be removed with activated carbon.

  • Combats a wide variety of gram-positive & gram-negative bacterial diseases
  • Treats bacterial gill disease, open red sores (Aeromonas spp.), body slime & eye cloud, black molly disease (Flavobacterium columnaris) and fin & tail rot
  • For use in both freshwater and saltwater aquariums
  • Includes 10 packets to treat up to 100 gallons of water

  • Empty one packet directly into aquarium for each 10 gallons of water
  • Repeat dose after 24 hours
  • Change 25% of the aquarium water 24 hours after second dose
  • Repeat treatment for a second time, for a total of 4 doses, followed by a final 25% water change
  • Add fresh activated carbon or replace filter cartridge after treatment

Manufacturer information

Aquarium Pharmaceuticals Aquarium Supplies
Aquarium Pharmaceuticals (API) has been helping people take good care of ornamental fish for over 40 years. Their research and development scientists have advanced the care of fish with all-natural medications, stable bacteria for biological filtration, one-bottle test kits, consumer-friendly dosing caps and much more. They’ve received over 25 global patents for their breakthrough innovations in the aquatics industry. And they continue to look for ways to improve the fishkeeping experience for hobbyists. Research. Experience. Dedication to scientific, quality treatment for healthy fish. It’s what makes API the first choice of aquarium owners. API manufactures and sells hundreds of products across many different product categories, including aquarium and pond treatments, aquarium equipment, aquariums and fish nutrition.

4 Stars


Reviewed on
December 13, 2017

Yes, I would recommend this.

Great against Bacteria Infections

Pros: Gentle on fish

One of the go to products to fight against quick killing bacteria infections. Easy to use and can be simultaneously used with other anti bacterial infection medicine

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william berman

Reviewed on
January 03, 2014

No, I would not recommend this.

Not working for me.

I have a Sailfin Tang that developed an infection on a fin that eroded most of the fin and developed a white cottony ball at the base of the fin. So far I have treated the tank 5 times to no avail. My corals are very unhappy about the treatment and are showing their displeasure by not opening very much. Today I am switching to E.M. ERYTHROMYCIN and will treat the tank for the next two days and report. My tank is a 92 gallon reef tank. I have been treating a dose of 8 packets each time. It gets expensive real fast. I have changed the water twice so far as directed on the package. I hope I don't lose the fish and hurt all the other inhabitants in the treatment process.

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enrique hernandez

Reviewed on
June 09, 2013

Yes, I would recommend this.

Great for ZoaPox!

Bought this to dip some stressed zoo's I had. Turns out I had A LOT of zoanthid pests roaming around but the good news is I patrol my reef like a cop on the beat. My tank is a small 6g fluval edge, so it is not much to patrol but I am very obervant and all my zoo colonies are near the top. Sucked all the pests one by one and dipped every frag where the pest was found using a coral dip (iodine). Anyway, these pests stressed my colonies and read on many forums that Furan-2 was the ultimate treatment for zoapox, boy were they right! Pox were gone about a week after 3 day consecutive baths. I noticed pox still affect the zoo's, but it doesn't seem to bother them, they just are vulnerable when stressed. Use 1/4 teaspoon for 32oz water and on third bath use 1/2 for 32oz water.

Was this review helpful? 6 0

daren tran

Reviewed on
February 27, 2012

Yes, I would recommend this.

Works Great

I bought this produt for a fin rot cure. After the first treatment, I could see it was working. After the recommended 4-day treatment, the fish was cured. Very happy with the product. Fish was never stressed at all. At everyday during treatment!

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al tonguis

Reviewed on
December 24, 2010

Yes, I would recommend this.


I got this for Zoapox and it works!

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nancy p.

Reviewed on
January 10, 2010

Yes, I would recommend this.


I use Furan-2 to get rid of the horrible green slime algae that likes to plague my freshwater aquarium. I follow all of the directions and the problem is solved.

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fadi abu tahoun

Reviewed on
May 03, 2009

Yes, I would recommend this.

great medication

This medication is great, am using it on my discus for treating various bacterial infection. U can see an fast improvement of health for the sick discus. Am always keeping an extra for emergency.

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jesse fink

Reviewed on
June 06, 2008

Yes, I would recommend this.

Furan 5

I used this product to treat Zoanthid Pox, this product is not designed for this treatment but its one of the only cures for Zoa Pox(zoa pox can wipe out all Zoanthid corals in a tank if not treated). After two treatments the zoa pox cleared up and are now looking great.

Was this review helpful? 7 0


Reviewed on
March 11, 2008

Yes, I would recommend this.

Works Great for Zoa Pox

Used for Zoa Pox and worked wonderfully!

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m. locknane

Reviewed on
January 17, 2008

Yes, I would recommend this.

A great internal parasite cure

For quick treatment of internal parasites that can be hard to rid your fish of, Furan 2 (which contains the key to real parasite butt-kicking - Metronidazole) is the best thing there is. It is readily absorbed into the body of the fish, and kills the parasites safely and without undue stress. I always have this product on hand, and I can't reccomend it enough.

Was this review helpful? 2 0

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