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

Day 1: Add the contents of one packet per 10 gallons of water.
Day 2: Add one packet per 10 gallons of water.
Day 3: Add one packet per 10 gallons of water.
Day 4: Add one packet per 10 gallons of water.
Day 5: Add one packet per 10 gallons of water.
Day 6: Repeat this five-day treatment if symptoms improve, but have not completely disappeared. If no improvement has occurred, try our Maracyn® Two and/or Maracyn® Oxy treatments.

• 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
• Always complete a full course of treatment, even if symptoms improve or disappear before the fifth dose
• No contraindications: can be used with all of our other products and meds
• Safe for use with invertebrates
• Some more sensitive plant species may display yellowing, but this condition generally improves after the treatment; remove any plants if concerned
• Do not perform water changes during the course of treatment. If ammonia or nitrite is a concern, detoxify during treatment with Fritz A.C.C.R. or Fritz Complete
• Overdosed? Perform a large water change if distress is observed

Note: FOR AQUARIUM USE ONLY. Consult a veterinarian or fish expert for assistance in diagnosis of disease causing organisms and treatment options. If you are unsure of the specific infection, Maracyn® may be used concurrently with Coppersafe®, Maracyn® Two or Maracyn® Oxy.

Treating an aquarium less than 10 gallons? Check our FAQ for some quick dilution recipes or watch our instructional video below.