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| Active Ingredients | Erythromycin |
| Treats | Gram-positive bacterial infections — fin rot, mouth fungus |
| Use In | QT tank, hospital tank |
Erythromycin Pellet is the targeted gram-positive antibiotic for larger fish or bottom-dwellers — the pellet companion to the flake form. Use when broader antibiotics have not resolved fin rot or body ulcers and you suspect a gram-positive bacterial strain.
Active ingredient: erythromycin (macrolide antibiotic) impregnated in pellet form, multiple sizes. Fed as sole food source for 7-10 days. Does not affect biological filtration since it stays in the gut. Pairs with kanamycin or nitrofurazone for combined gram-positive + gram-negative coverage. For exact feed schedule, see the Antibiotics tab on our Medication Dosing Calculator.
Treats: gram-positive bacterial infections, suspected mycobacterial issues, certain fin rot strains.
Use in: quarantine, hospital tank, or display.
Reef safe: yes — antibiotic stays in the fish.
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All medications sold by FisHotel are intended exclusively for ornamental aquarium fish. They are not for human consumption, not for food-producing animals, and not for use in any tank stocked with fish intended for human consumption. By proceeding, you acknowledge that you are purchasing these medications for ornamental aquarium use only, that you understand proper dosing and handling, and that you accept full responsibility for safe application.
