Quick and effective treatment for infections of true fungal infections
  • Treats a broad range of fungal and bacterial infections
  • Easy to dose liquid formula
  • Safe for most invertebrates and plants
  • May be used along with Coppersafe®, Maracyn®, or Maracyn® Two

Overview

Fritz Maracyn® Oxy is a fast-acting treatment for true fungal infections on fish and fish eggs, as well as certain bacterial diseases. Maracyn Oxy works by slowly releasing a stabilized oxygen-chlorine compound that targets a broad range of tropical fish diseases, including both gram-negative and gram-positive bacterial infections.

Fungal infections look like white cotton tufts, similar to the mold you’d see on fruit or bread, but white rather than black or green. Infections typically appear at wound sites or areas recently damaged by parasites, making them secondary infections that follow an initial injury or illness. Because of this, they can be stubborn to treat without a targeted remedy.

Maracyn Oxy is formulated specifically for these cases, providing effective relief when used as directed.

Active Ingredient: Sodium chlorite

Indications

Maracyn® Oxy is a non-antibiotic treatment that for the control of true fungal infections caused by Saprolegnia, Ichthyosporidium, egg fungus and related species, and some common bacterial infections, such as fin and tail rot. Maracyn® Oxy 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.

Mouth fungus

Fin and Tail Rot

Fish Egg Fungus

Saprolegnia

Consult a veterinarian or fish expert for assistance in diagnosis of disease-causing organisms and treatment options.
All suspected fungal or bacterial infections should be treated immediately.

Common symptoms

Symptoms of possible fungal infection can include clamped fins, swollen eyes, heavy or rapid breathing, patchy coloration, change in swimming behavior or corner-hiding.

Fungus

Whitish tufts of cotton-like material found on fins, tail and/or body at sites of injury

Fin and Tail Rot

Split, ragged or deteriorating fins and/or tail

Other symptoms may include:
Clamped fins, swollen eyes, patchy coloration, heavy or rapid breathing

Preparations & Directions

Preparations
  • Use of a hospital tank is recommended.
  • Maintain normal filtration, carbon does not need to be removed during treatment.
  • Maintain aeration and water flow.
  • Do not perform water changes during the treatment period if possible. If ammonia is a concern, neutralize it with a water conditioner like Rescue A.C.C.R. or Complete.
Maracyn Oxy Dose Calculator
Directions

Day 1

Dose: 2.5 mL (1/2 capful) per 10 gallons of water. For smaller tanks, use 5 drops per gallon.

Day 2 – 6

Repeat dose daily.

Day 6

If symptoms are still present, do not repeat. A repeat course of treatment will not be effective.

If symptoms do not respond to Maracyn Oxy, we recommend treating with Maracyn and/or Maracyn Two.

Notes

Water changes

  • May be safely used along with other treatments: Coppersafe, Maracyn, and Maracyn Two.

  • Treatment may inhibit nitrifying bacteria. Monitor ammonia and nitrite levels during treatment.

  • Not suitable for use with starfish or related species; safe for use with other types of invertebrate

Precautions: Keep out of reach of children. Warnings: Causes irritation. Avoid contact with eyes, skin and clothing. If in eyes; flush eyes with water for 15 minutes. Call a physician. If on skin; flush skin with water (wash clothing before reuse). Wash thoroughly after handling. This product is intended for the exclusive use with ornamental fish and/or other ornamental organisms and is not intended for use with humans or fish for human consumption.

Compatibility

Species
Compatible?
Saltwater fish
yes-green
Yes
Freshwater fish
yes-green
Yes
fish-freshwater-betta
Bettas
yes-green
Yes
fish-freshwater-generic
Brackish species
yes-green
Yes
fish-freshwater-generic
Scaleless species
yes-green
Yes
pond-koi
Koi and goldfish
yes-green
Yes
invert-snail
Snails and other invertebrates
Check-green-icon
Yes
aqautic-plants
Live plants
Check-green-icon
Yes, some species may show yellowing
coral-SPS
Coral
Check-green-icon
Yes
invert-starfish
Starfish and related species
Caution-icon
Not recommended
Equipment / Products
Compatible?
Notes
Bottles-icon
FritzZyme Nitrifying Bacteria
yes-green
Yes
FritzZyme will not affect treatment, but the treatment may affect beneficial bacteria. Monitor water quality, re-dose bacteria as needed.
Bottles-icon
Water conditioners
Caution-icon
No
Water conditioners will neutralize the active ingredient in Maracyn Oxy if dosed together.
Treatments-icon
Maracyn
yes-green
Yes
Safe to use at the same time
Treatments-icon
Maracyn Two
yes-green
Yes
Safe to use at the same time
Treatments-icon
Coppersafe
yes-green
Yes
Safe to use at the same time

Product documents and dealer resources

Item #SizeTreats up toCase QTYUPC
750440004 oz472 gallons (1,787 L)12080531440001
7504406016 oz1,888 gallons (7,147 L)12080531440605

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