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  • For best results, use Expel-F in a quarantine tank
  • Remove activated carbon and ion-exchange resins during treatment.
  • Discontinue use of skimmer during treatment for the first three days of treatment
  • Do not perform water changes during treatment if possibleCan be used full strength with scaleless fish
  • Safe for invertebrates including: corals, snails, shrimp, clams, other crustaceans and molluscs

Fritz Expel-F is a fast-acting, effective and aquarium safe formula designed to treat harmful true fungal infections fin rot, Ichthyophonus hoferi and Saprolegnia. The fast dissolving powder is suitable for both freshwater and saltwater aquariums and is safe for most plants and invertebrates. Fritz Expel-F will negatively impact Bryopsis algae growth. Comes in a pack of 10.


  • Use one packet of Fritz Expel-F per 10 gallons of aquarium water in a small container, and add it to a high flow area in the sump. The powder will dissolve over time. Treatment requires one dose, treatment period is 14 days.

Fritz Expel-F


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