Fritz Mardel Maracyn 24 count

In stock
4 in stock
FTZ 46040
  • Highly effective treatment for bacterial infections in fish
  • Effective against gram-positive pathogenic organisms
  • Non-toxic to invertebrates

Provides relief from bacterial infections such as body fungus, gill disease and popeye in fresh and saltwater aquariums.

Mardel Maracyn is a specially compounded broad-spectrum antibiotic (erythromycin) 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. It is primarily effective against gram-positive pathogenic organisms. Symptoms of clamped fins, swollen eyes, heavy or rapid breathing, patchy coloration, change in swimming behavior or corner-hiding can be signs of possible bacterial infection.

All suspected bacterial infections should be treated immediately.

Mardel Maracyn is non-toxic to invertebrates. Follow dosage directions as detailed on the product packaging.


Add the contents of one package per 10 gallons of water and repeat every 24 hours for 5 days. Repeat this 5 day treatment only once if needed.

Important: Treat for 5 days even if visible signs disappear. Maracyn may be used concurrently with Coppersafe, Maracyn Two or Maracyn Oxy. Maracyn will not harm invertebrates. Maracyn 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.

More Information
SKUFTZ 46040
Shipping OptionAll Shipping
Write Your Own Review
You're reviewing:Fritz Mardel Maracyn 24 count
Your Rating