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API EM Erythromycin Medication - 10ct Powder Packets

API EM Erythromycin Medication - 10ct Powder Packets


Item #: AP1811

Temporarily Out of Stock

API EM Erythromycin Medication - 10ct Powder Packets

API EM Erythromycin is a broad spectrum treatment used to control bacterial disease. It can be used to treat body slime, mouth fungus, Furunculosis (open lesions and swelling), bacterial gill disease and hemorrhagic septicemia (blood spots without sign of skin damage).It can also be used with any API Ich, fungus or parasite remedy to help prevent secondary bacterial infection. This medication will not color the aquarium water.

  • Treats body slime, mouth fungus, Furunculosis, bacterial gill disease, and hemorrhagic septicemia
  • Can be used with any API Ich, fungus or parasite remedy
  • For use in both freshwater and saltwater aquariums
  • Will not color the aquarium water
  • Includes 10 packets and will 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.

5 Stars


Reviewed on
October 19, 2017

Yes, I would recommend this.

The only med that work for my fishes

This product is awesome It's the only one that work for my fishes. I've used Melafix and other anti bacteria med, but none work. This one is able to cure my fish and bring it back to life.

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peter bilotta

Reviewed on
August 29, 2011

Yes, I would recommend this.

Effective and Safe

I battled a red slime / cyano-bacteria outbreak in my reef tank for nearly six months with everything from frequent water changes and cleaning, to red slime algae removers. All water parameters tested normally, so I could not identify the cause. Based on a number of recent online discussions of EM Erthromycin and Maracyn as effective weapons, I finally bit the bullet and resorted to this. API EM Erthromycin immediately knocked back the cyanobacteria with no harmful effect on any of my livestock - fish, corals or inverts. I could detect no discernable effect on my bacteriological filter, based on frequent water testing. The tank was slime-free within 48 hours, allowing me to finally gain the upper hand in managing this problem. It does make your skimmer go wild, so best to turn it off during treatment. All-in-all, very effective and safe.

Was this review helpful? 11 0

william giles

Reviewed on
July 09, 2009

Yes, I would recommend this.


QUTSTANDING PRODUCT EVEN BETTER THAN ADVERTISED! I purchased this product out of sheer desparation because my 55 gallon fresh water aquarium was badly contaminated with blue-green algae which smells fishy and swampy and was covering almost all of my legitamate water plants. It turns out that this "alage" was actually cyanobacterium, not alage. This product absolute destroyed the infestation and now the water no longer smells like a rotting swamp and my water is crystal clear. I could also see the increase in the energy level of my fish and shrimp.THIS IS THE REAL DEAL.

Was this review helpful? 8 0

teodolinda zavala

Reviewed on
February 13, 2009

Yes, I would recommend this.

Erytromcycin work

I had 5 gold fish in acuarium of 10 galons. One of them pass away. He showed all sign of bacterial infection. I was looking for some information for them before the fish pass away, i found and then i bought erythromicin. It came so fast but to late for my fish. The other fish are now very well. In other words it product realy work. I recommend for every one has an acuarium. Thanks petstore. Teodolinda

Was this review helpful? 1 0

joshua ramirez

Reviewed on
August 15, 2008

Yes, I would recommend this.

Works great on BBA

I bought this not for actual medication but rather to help eradicate a bunch of BBA - worked like a charm. I used 1 packet (for my 100g) after each water change and it did a great job of killing off the algae.

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neil watts

Reviewed on
May 20, 2008

Yes, I would recommend this.


excellent product,not over packaged and a must for anyone with a persistant dose of blue green cyno-bacteria.

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