Fritz Maracyn® Oxy – 118ml

Fritz Maracyn Oxy – Fast-Acting Fish & Egg Fungus Treatment (118 ml)

Fritz Maracyn Oxy uses a stabilized oxygen-chlorine solution to combat true fungal infections (like Saprolegnia and egg fungus) and secondary bacterial issues such as fin/tail rot in both freshwater and saltwater aquariums.

Key Benefits

• Effective against fungal pathogens (Saprolegnia, eggs fungus) and some gram-negative/positive bacteria (fin & tail rot)
• Non-antibiotic and safe for most aquatic livestock — fish, plants, invertebrates (except starfish)
• Doesn’t negatively impact beneficial nitrifying bacteria—no filter removal required
• Compatible with other treatments—can be used alongside Maracyn Two, Coppersafe

Directions & Dosage

• Standard dose: 2.5 ml (½ cap) per 10 US gal (38 L); for smaller tanks, use 5 drops per gallon
• Dose once daily; repeat for up to 5 days total
• On day 6+, if symptoms persist, switch to Maracyn or Maracyn Two
• Use in quarantine or main tank; no water changes during treatment
• Increase aeration; turn off UV sterilizers
• If fish show distress, neutralize with FritzGuard, ACCR, or Complete

Product Details