One of these 500 mg capsules of penicillin can treat 20 gallons of aquarium water within a 24-hour period of time
One of these 500 mg capsules of penicillin can treat 20 gallons of aquarium water within a 24-hour period of time
  • One of these 500 mg capsules of penicillin can treat 20 gallons of aquarium water within a 24-hour period of time

Aquanest Fish Penicillin 500 MG - 100-Count, Broad-Spectrum Bacterial Antibiotic, Capsules

$89.99

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Applies to delivery within the 48 contiguous states only.
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  • Fish Peni (Penicillin) is a broad-spectrum antibiotic used in the treatment of a wide range of bacterial infections
  • It’s an effective treatment for pop-eyes, infected eyes, fin or tail rot, gill disease, columnaris disease, and skin ulcerations
  • One of these 500 mg capsules of penicillin can treat 20 gallons of aquarium water within a 24-hour period of time
  • Intended for ornamental fish only and not intended for use with fish that are intended for human consumption


Fish Peni (Penicillin) is an effective treatment for pop-eyes, infected eyes, fin or tail rot, gill disease, columnaris disease, and skin ulcerations and other bacterial diseases in ornamental fish. Add one capsule (500 mg) into aquarium for each 20 gallons of water to be treated. Repeat in 24 hours. It is suggested that a partial water change be made between treatments. While duration of treatment depends on type and severity of the infection, it is recommended that extended baths in the medication continue for a minimum of five days and for not more than 10 days. Discontinue treatment with this medication if no improvement is noted within five days. Fish Antibiotics are for aquarium use only. Intended for ornamental fish and/or ornamental organisms, and not intended for use with fish that are intended for human consumption.

36 AN7061


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