FritzMardel Maracyn Oxy

Fritz Maracyn Oxy treats true fungal infections on fish and eggs plus common bacterial diseases in both freshwater and saltwater. It slowly releases a stabilized oxygen-chlorine complex that tackles a wide range of issues, from egg fungus and body fungus to fin and tail rot. Explore more fish medication.

Features

• Treats true fungal infections such as Saprolegnia, Ichthyosporidium, and egg fungus
• Also controls common bacterial infections like fin and tail rot
• Slow-release stabilized oxygen-chlorine formula
• Helps fish showing clamped fins, swollen eyes, or rapid breathing
• Safe for freshwater and saltwater aquariums

Choose Your Size

• 4 oz for smaller tanks
• 16 oz for larger systems and better value

How to Use

• Use 2.5 mL (1/2 capful) per 10 gallons; for small tanks, 5 drops per gallon
• Repeat daily as needed for up to 5 days
• Remove activated carbon during treatment

Specifications

Recommended Pairings

• Protect the slime coat with BacterShield
• Treat parasites with Coppersafe
• Browse all medication

Frequently Asked Questions

What does it treat?
True fungal infections on fish and eggs plus some bacterial diseases like fin and tail rot.

How long do I treat?
Dose daily for up to 5 days as needed.

Do I remove carbon?
Yes, carbon strips the medication, so remove it during treatment.