FritzPro Methylene Blue

  • Effective fungus control
  • Aids in general disease control
  • Useful as a bath for ammonia poisoning
  • Useful for shipping of fish as it prevents disease spread and is a hemoglobin transfer agent, allowing more oxygen in crowded environments
  • For use in freshwater and marine aquariums

About FritzPro Methylene Blue

FritzPro Methylene Blue is effective against superficial fungal infections of fish. Methylene Blue is also effective in protecting newly laid fish eggs from being infected by fungus or bacteria, which is useful when artificially hatching. As a secondary use, it is effective against some external protozoans, including Ichthyophthirius (Ick), Chilodonella and Costia. Methylene Blue is very effective when used as part of a bath for treatment of ammonia, nitrite and cyanide poisoning, as well as for topical and internal treatment of injured or sick fish as a first response.

Directions & Dosage

General Use: Add 1 cap (1 tsp/5 ml) per 10 U.S. gallons (38 L)

For Dips and Baths: Prepare a separate tank. Add 5 caps (5 tsp/25 ml) per 3 gallons. Dip fish for no more than 10 seconds.

To aid in general disease prevention, detoxification of fish suffering from nitrite or cyanide poisoning and for use as a prophylaxis against fungus infections of fish spawns (eggs): Add 10 drops per gallon (3.78 liters) or 1 teaspoon per 10 gallons (37.8 liters) of water (this will result in 3 ppm Methylene Blue). Discontinue carbon filtration but keep all other filtration running during treatment. Replace carbon after treatment.


Size Treats Item Number
4 oz. N/A 86804
16 oz. N/A 86816



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