Fish Antibiotics – Trusted Aquarium Medications for Healthy Fish

Welcome to CALVETSUPPLY, your trusted source for pharmacy-grade fish antibiotics designed specifically for aquarium use. Our carefully selected medications help aquarium owners, breeders, and aquatic professionals effectively treat bacterial, fungal, and parasitic infections in both freshwater and saltwater fish.

Our collection features the most trusted aquarium medications in the aquatics industry, including Amoxicillin, Cephalexin, Doxycycline, Azithromycin, Clindamycin, Metronidazole, Ciprofloxacin, Penicillin, Fluconazole, and Sulfa & Trimethoprim. Each treatment is lab-tested to ensure safety, purity, and reliable results.

Whether you’re addressing fin rot, ich, gill disease, or internal infections, CALVETSUPPLY provides the right solution to restore balance and protect your aquarium ecosystem. Our products are easy to dose, discreetly packaged, and shipped quickly within the U.S. — ensuring your fish get the care they need without delay.

Note: All fish antibiotics sold by CALVETSUPPLY are labeled exclusively for aquarium use and comply with U.S. regulations for non-prescription aquatic care.

Fish Mox
Fish Mox is a trusted antibiotic for treating bacterial infections in aquarium fish. Ideal for fin rot, gill disease, and internal infections, it promotes rapid recovery and healthy water balance. Each capsule is easy to dose and made from pharmaceutical-grade ingredients for safe aquarium use.
Fish Flex Cephalexin
Keep your fish healthy with Fish Flex (Cephalexin), one of the most trusted fish antibiotics for treating bacterial infections like fin rot, columnaris, and skin ulcers. Available in 500mg and 250mg strengths, and 100-count or 30-count bottles, perfect for both freshwater and saltwater aquariums.
Fish pen
Keep your fish friends swimmingly happy and healthy with Fish Pen, a trusted choice in fish antibiotics for treating common bacterial infections such as fin rot, tail rot, and columnaris. Each capsule contains 500mg of Penicillin to help restore your fish’s health quickly and safely. Available in 30-count and 60-count bottles, Fish Pen is suitable for both freshwater and saltwater aquariums—perfect for maintaining a clean, healthy tank environment and supporting your fish’s long-term well-being.

Fish Zole
Keep your aquarium fish healthy and vibrant with Fish Zole , a trusted fish antibiotics treatment that targets bacterial and protozoal infections. Formulated with Metronidazole, Fish Zole is effective against Hexamita, Hole-in-the-Head disease, and other common parasitic infections. Available in 500mg 60-count and 250mg 60-count bottles, it’s perfect for both freshwater and saltwater aquariums. Fish Zole helps restore your fish’s vitality, appetite, and overall well-being , keeping your aquarium balanced and your fish thriving.
Fish Flucon
Fish Flucon (Fluconazole) is a trusted antifungal treatment for aquarium fish, effective against ich, cloudy eyes, and fin fungus in both freshwater and marine tanks. Formulated for safety and purity, it helps restore water clarity and fish health. Shop Cal Vet Supply for fast U.S. shipping and reliable aquarium care solutions.
Fish Doxy – Aquarium Antibiotic
Fish Doxy offers effective treatment for bacterial and internal infections in aquarium fish. Ideal for both freshwater and marine tanks, it promotes faster recovery and overall fish health. Shop Cal Vet Supply for quality aquarium antibiotics and fast U.S. shipping.

Fish zithro
Fish Zithromycin is a trusted aquarium antibiotic used to treat gram-positive and resistant bacterial infections in fish. Safe for both freshwater and marine tanks, it helps restore your fish’s health quickly and effectively. Cal Vet Supply offers quality fish antibiotics with fast U.S. shipping and discreet packaging for all your aquarium care needs.
Fish Clindamycin
Fish Cin (Clindamycin) provides targeted treatment for anaerobic and resistant bacterial infections in aquarium fish. Safe for freshwater and marine environments, it promotes recovery and balanced aquarium health.
Fish Flox
Fish Flox provides broad-spectrum bacterial protection for aquarium fish. Effective against fin rot, ulcers, and gill infections, it promotes fast recovery and clear water. Safe for both freshwater and marine tanks.

Fish Sulfa
Fish Sulfa (Sulfamethoxazole + Trimethoprim) provides dual-action antibacterial protection for aquarium fish. Ideal for fin rot, gill infections, and internal bacterial issues. Safe for freshwater and marine tanks. Fast U.S. shipping from Cal Vet Supply.