Directions & Dosage
- For best results, use Maracyn® Two in a quarantine tank
- Remove carbon during treatment, maintain adequate water flow or aeration
- Maracyn® Two may cause excessive foam production in protein skimmers or tanks with airstones. Stop use of skimmer during...
- UV Sterilizer can be used during treatment
- Cloudiness may occur during treatment; this is normal and...
Can I use maracyn® during the course of treatment?
Do not perform water changes during the course of treatment. Maracyn® does not inhibit nitrifying bacteria, and will not impact the biofilter. If ammonia or nitrite is a concern, detoxify during treatment with Fritz A.C.C.R. or Fritz Complete.
How do you dose maracyn 2 per gallon?
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.
Can I use maracyn® and maracyan® 2 in the same aquarium?
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.
Does maracyn®/maracyn two work on nitrifying bacteria?
Almost all nitrifying bacteria are gram-negative and not adversely affected by Maracyn® and you should not see either an ammonia or nitrite spike. I’ve used Maracyn®/Maracyn® Two twice now for two full treatments and it does not appear to be working, can I treat a third time?

How do you use Maracyn?
Add the contents of one packet per 10 gallons of water and repeat every 24 hours for 5 days.For best results, use Maracyn® in a quarantine tank.Remove carbon during treatment, maintain adequate water flow or aeration.Discontinue use of skimmer during treatment if foaming is a concern.More items...
How do you use Oxy Maracyn?
Use 2.5 mL (1/2 capful) per 10 gallons of water. Repeat daily as needed for up to 5 days. Day 6: If symptoms are still present, a repeat course of treatment will not be effective.
What antibiotic is in Maracyn?
erythromycinMaracyn's active ingredient is an antibiotic called erythromycin. It provides relief from bacterial infections such as body fungus, gill disease, fin rot and popeye in freshwater aquariums.
What does Maracyn treat in fish?
Mardel Maracyn is for the treatment and control of body fungus "columnaris," fin and tail rot, popeye and gill disease in freshwater fish, including tetras, cichlids, livebearers, catfish and goldfish to mention just a few and many saltwater fish as well.
Is Maracyn Oxy effective?
MaracynOxy has been shown to be effective against certain gram-negative and gram-positive bacteria. MaracynOxy can be used to treat fish exhibiting the following symptoms: clamped fins, swollen eyes, heavy or rapid breathing, patchy coloration, or any change in behavior of the fish.
Is Maracyn Oxy an antibiotic?
A non-antibiotic solution for the treatment and control of the symptons associated with common bacterial and fungal infections of fresh and saltwater fish.
What is the active ingredient in Maracyn 2?
MINOCYCLINEfRITZ - Maracyn TwoActive Ingredient/Active MoietyIngredient NameBasis of StrengthStrengthMINOCYCLINE (UNII: FYY3R43WGO) (MINOCYCLINE - UNII:FYY3R43WGO)MINOCYCLINE10 mg in 0.6 g
What is the active ingredient in Maracyn?
ERYTHROMYCIN PHOSPHATEPACKAGING COMPONENTActive Ingredient/Active MoietyIngredient NameBasis of StrengthStrengthERYTHROMYCIN PHOSPHATE (ERYTHROMYCIN)ERYTHROMYCIN PHOSPHATE200 mg in 0.6 g
What is Melafix used for?
MELAFIX™ API® MELAFIX fish remedy is an all-natural antibacterial treatment that works to treat infections in fish. Common bacterial infections are open wounds and abrasions, tail rot, eye cloud, and mouth fungus. MELAFIX fish remedy also promotes regrowth of damaged fins and tissue.
What antibiotic is in Maracyn 2?
minocyclineMardel Maracyn Two powder is a minocycline-based antibiotic medication which has been shown to be effective against a number of pathogenic bacteria associated with ornamental fish disease. Minocycline is a broad-spectrum antibiotic which is easily absorbed by fish directly through the skin.
Is Maracyn 2 safe for scaleless fish?
Maracyn and Maracyn 2 are the only two I have used. Since it's often hard to know which bacteria is gram negative or gram positive, often the two are used together safely. I see no harm in them to scaleless fish since they do not contain cooper.
Does Maracyn treat dropsy?
Treatment. Dropsy is not easily cured. Treatment is geared toward correcting the underlying problem and providing supportive care to the sick fish. A broad spectrum antibiotic specifically formulated for gram-negative bacteria is recommended, like Mardel Maracyn® 2.
What is Fritz Maracyn?
Maracyn® is a specially compounded broad-spectrum antibiotic which has been shown to be effective against a number of pathogenic bacteria associated with ornamental fish disease. It was developed for complete but gradual dissolution in water.
Can you use maracyn in a quarantine tank?
For best results, use Maracyn® in a quarantine tank. Remove carbon during treatment, maintain adequate water flow or aeration. Discontinue use of skimmer during treatment if foaming is a concern. UV Sterilizer can be used during treatment.
Can you use Maracyn 2 with Maracyn 2?
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.
Does Maracyn affect biofilters?
Do not perform water changes during the course of treatment. Maracyn® does not inhibit nitrifying bacteria, and will not impact the biofilter. If ammonia or nitrite is a concern, detoxify during treatment with Fritz A.C.C.R. or Fritz Complete.
What Is Fritz Maracyn Used For?
Fritz Maracyn is an antibiotic used for treatment against bacteria occurring in ornamental fish. It is often used to ease the symptoms of bacterial infection, including body fungus, popeye, and bacterial gill disease.
What Is Maracyn And What Does Maracyn Treat In Fish?
Maracyn is essentially a broad-spectrum medicine that contains the active ingredient Erythromycin. It is effective against a wide range of bacteria and is administered to the water tank in measured doses. A vet or fish expert will be able to identify the symptoms associated with a bacterial infection in your fish.
What Is Maracyn 2 And What Does Maracyn 2 Treat In Fish?
Just like Maracyn, Maracyn 2 is medicine in powder form that combats the symptoms of bacterial infection. It works primarily against gram-negative bacteria as compared to Maracyn, which kills gram-positive bacteria.
Where To Buy Maracyn And Maracyn 2?
Maracyn and Maracyn 2 are antibiotic products developed by Fritz Aquatics. You can buy these options from the Fritz official website, online stores, or your local vet.
How To Use Maracyn?
Maracyn and Maracyn 2 are powders that dissolve in water to kill the infection-causing bacteria. It is recommended to add one packet per 10 gallons of water and repeat after 24 hours for 5 days. If there isn’t any change in the condition of the fish after 5 days, repeat the procedure once more.
FAQs
Yes, Maracyn and Maracyn 2 can be used together since they work on different bacteria and do not have any adverse effects upon combining. However, the population of the beneficial bacteria in the tank might be affected after adding Maracyn. These good bacteria are essential since they remove excess ammonia from the water.
Final Thoughts
Here, we’ve tried to cover most of the questions you might have about Maracyn and Maracyn 2. We hope this guide helped clear any doubts about Maracyn and its uses. Ultimately, providing Maracyn treatments, either individually or combined, are a completely safe way to kill disease-causing bacteria.
