Mardel Maracyn® 2

For infections of:

  • Fin and tail rot
  • Popeye
  • Gill disease
  • Dropsy (swollen body, protruding scales)
  • Septicemia (bleeding or red streaks on body)
  • Secondary and internal infections

About Mardel Maracyn® 2

Provides relief from bacterial infections such as fin and tail rot, popeye and dropsy in fresh and saltwater aquariums.

Mardel Maracyn® 2 powder is a broad-spectrum antibiotic (minocycline) developed for use in aquariums. Due to its unique properties, it is absorbed by the fish through the skin. During the prescribed treatment, the concentration of minocycline in the fish fluids rises to a therapeutic level and is available to fight systemic infections susceptible to its action. It is primarily effective against gram-negative pathogenic organisms. Internal diseases are more difficult to detect than external ones and early detection is almost impossible. Symptoms of clamped fins, general listlessness, not eating or other unusual behavior can be caused by internal infections. All suspected bacterial infections should be treated immediately.

Mardel Maracyn® 2 is non-toxic to invertebrates.

Directions & Dosage

First day: Add the contents of two packets per 10 gallons of water.
Second through fifth day: Add one packet per 10 gallons of water.
Repeat this five-day treatment once if needed.

Cloudiness may occur while using Maracyn® 2.

Important: Treat for five days even if visible signs disappear. May be used concurrently with Coppersafe®, Maracyn® or Maracyn® Oxy. Maracyn® 2 will not harm invertebrates.

Maracyn® 2 may cause excessive foam production in protein skimmers. Stop use of skimmer during treatment if excessive foaming is a concern.

Note: Consult a veterinarian or fish expert for assistance in diagnosis of disease causing organisms and treatment options.

Sizes

Size Treats Item Number
8 count N/A 47000
24 count N/A 47040

FAQs

FAQs

See below for frequently asked questions regarding Mardel Maracyn® 2.

  • How can I treat smaller volumes of water with Maracyn 2 than what the directions show?

    Open the packet of Maracyn Two carefully and pour into a watertight container with 10 cups of  cold water. Close watertight container and shake vigorously to mix thoroughly. Do so until all Maracyn Two powder is dissolved. You now have ten 1 gallon doses of Maracyn Two mixed. 

    Shake well.

    First day: Add two cups of solution per 1 gallon of water.
    Second through fifth day: Add one cup of solution per 1 gallon of water.
    Repeat this five-day treatment once if needed.

    Refrigerate betweeen uses.

    Cloudiness may occur while using Maracyn® 2.

    Important: Treat for five days even if visible signs disappear. May be used concurrently with Coppersafe®, Maracyn® or Maracyn® Oxy. Maracyn® 2 will not harm invertebrates.

  • I have a 1-gallon betta bowl that I am medicating; if each packet treats 10 gallons (2 packets per 10 gallons for the initial dose of Maracyn® 2) how do I treat my betta?

    Take a small cup, such as a medicine dosing cup that you might get with a cough syrup or allergy medicine (a shot glass will work as well). Fill the cup and pour it into a large container which can be sealed. Fill that same small cup nine more times with the exact same amount of water and add to the large container, for a total of ten measures of water. Dissolve one packet of Maracyn®/Maracyn® 2 into the water in the large container. You can now dose exactly one dose per gallon into your small aquarium by using the same small cup for dosing. Store the mixed solution in the refrigerator. You can also use a gram scale, if available, to measure out the appropriate amount of powder.

  • I think my fish has a bacterial infection, how do I know which product, Maracyn® or Maracyn® 2, to use?

    If you see specific symptoms mentioned on the packaging or enclosed brochure (body fungus for Maracyn®, Fin and Tail Rot/Popeye/Dropsy for Maracyn® 2) treat accordingly. However, if the symptoms are less specific and harder to identify, start with Maracyn® 2 (which is a broader spectrum product) before using Maracyn®.

  • Can I use Maracyn® and Maracyn® 2 simultaneously?

    Yes. Maracyn® targets gram-positive bacteria and Maracyn® 2 targets mostly gram-negative bacteria. They may be used in conjunction with one another. However, in doing so, the balance of beneficial bacteria in your aquarium, including nitrifying bacteria to remove ammonia and nitrite will be adversely impacted. Fritz strongly recommends the following: *For freshwater aquariums, have on hand and ready to use FritzZyme® 7 to replace the nitrifying bacteria that naturally remove ammonia and nitrite and FritzZyme® 360 to replace the other beneficial bacteria in the aquarium. *For saltwater aquariums, have on hand and ready to use FritzZyme® 9 to replace the nitrifying bacteria that naturally remove ammonia and nitrite and FritzZyme® 460 to replace the other beneficial bacteria in the aquarium.

  • I’ve used Maracyn®/Maracyn® 2 twice now for two full treatments and it does not appear to be working, can I treat a third time?

    That would indicate that the source of the problem is not affected by the active ingredients in Maracyn®/Maracyn® 2. In this situation, rather than repeating an ineffective treatment, using a medication with a completely different active ingredient might be the best solution. So if Maracyn® was not effective, try Maracyn® 2 and vice versa.

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