Fritz Aquatics Mardel Maracyn Freshwater and Saltwater Bacterial Infection Fish Medication - 20 Count

Fritz Maracyn is a broad-spectrum antibiotic (erythromycin) effective against many common gram-positive bacterial fish diseases. It treats issues like body fungus, bacterial gill disease, popeye, and mouth rot, dissolving completely in water to deliver relief from infections and helping fish recover in a healthy environment.