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| Active Ingredients | Erythromycin |
| Treats | Gram-positive bacterial infections — fin rot, mouth fungus |
| Use In | QT tank, hospital tank |
Erythromycin Flake is the targeted antibiotic for gram-positive bacterial infections in fish that still eat — mycobacterial-suspected issues, certain fin rot strains, body ulcers that did not respond to broader antibiotics. The macrolide that nitrofuran misses.
Active ingredient: erythromycin, impregnated in a flake. 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, some fin rot strains.
Use in: quarantine, hospital tank, or display.
Reef safe: yes — antibiotic stays in fish, not water.
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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.
